Double insulation doubles the R value

R-value according to ASTM F3340-18

WHY?

For the first time, a standardized test for determining the thermal properties of mats was defined. End consumers can thus weigh up their purchase decision better and compare the individual providers directly with one another.

Before this new standard was introduced, there was no single method of determining how warm a mat was. The thermal properties of a mat are determined by the R-value: R stands for resistance. The higher the R-value, the warmer the mat, although the numbers have come about in a variety of ways. Many manufacturers had their own methods, which made it very difficult if not impossible to compare products from different brands. Many mat manufacturers and some large specialist dealers were involved in the three-year project to develop a uniform standard.

The new standard is called ASTM F3340-18, “Standard test method for determining the heat retention of camping mats using a hot plate structure”.

THE TEST

It is a laboratory test that reduces the confounding factors that occur when testing people. The sleeping mat is clamped between a warming plate (simulates the sleeping person) and a cold plate (simulates the cold floor) with pressure. During the test, it is measured how much energy has to be applied in order for the heating plate to keep its temperature constant. From this, the R-value is calculated - and thus how well the mat insulates. Compared to sleeping bags, this is a relatively simple structure, but it still requires special, expensive measuring devices.

WHAT SIGNIFICANCE DOES THE TEST HAVE FOR ME?

The big advantage is that mats from different manufacturers can now be compared directly with one another. This does not mean that the previous mats had incorrect R-values. However, different test setups very likely resulted in different values ​​that cannot be compared with each other.

ARE THERE DISADVANTAGES?

The standard measures heat retention when the mat is in the ideal position. Factors such as pressure on the mat or sleeping position are not taken into account. These are unlikely to have a major impact on most mats. However, if a mat is too small, it will definitely not be as warm as a mat the right size. There will certainly be some mats that do better or worse in personal use than the determined R-value. In order to determine this, a large number of mats still have to be tested according to the new standard.

WHAT IS NOT TESTED

ASTM F3340 only provides information on the R-value, i.e. the heat retention of a mat. It doesn't take into account how comfortable, durable, easy to inflate, or user-friendly the mat is. In short, a high R-value doesn't mean it's a good product for a job. In warm conditions, the user may not want the warmest mat. In addition, ASTM F3340 only tests new mats. These can differ from those that have already been in use for a few weeks, as the performance of the various insulation materials and technologies has a different service life.

Mats tested according to ASTM F3340-18

NEMO Quasar 3D Insulated - sleeping mat
The Quasar 3D Insulated from NEMO uses the design of the Cosmo 3D for maximum sleep support and comfort and goes one step further with the first bluesign®-certified sustainable cover from NEMO. The environmentally conscious, durable 30D polyester ripstop of the NEMO Quasar 3D Insulated is made from 100% recycled materials that offer both a soft, luxurious feel and a supportive stretch that you can feel comfortable with. For quick inflation, deflation and the ability to achieve your preferred strength, the Quasar 3D Insulated is equipped with the Laylow zero profile, a multifunctional, micro-adjustable valve. And NEMO dispenses with a heavy foot pump and supplies a Vortex pump bag for quick and easy inflation - and all that with a small pack size. The NEMO Quasar 3D Insulated has PrimaLoft® insulation for even more warmth on cool nights.
NEMO Quasar 3D - sleeping mat
The Quasar 3D from NEMO uses the design of the Cosmo 3D for maximum sleep support and comfort and goes one step further with the first bluesign®-certified sustainable cover from NEMO. The environmentally conscious, durable 30D polyester ripstop of the NEMO Quasar 3D is made from 100% recycled materials that offer both a soft, luxurious feel and a supportive stretch that you can feel comfortable with. For quick inflation, deflation and the ability to achieve your preferred strength, the Quasar 3D is equipped with the Laylow zero profile, a multifunctional, micro-adjustable valve. And NEMO dispenses with a heavy foot pump and supplies a vortex pump bag for quick and easy inflation - and all that with a small pack size.
NEMO Roamer Double - sleeping mat for 2
When you want it all - luscious comfort and a size that feels like you're sleeping at home - NEMO's Roamer Double offers luxurious sleep on the go. With a small pack size (compared to the size of the mat), but still tall and light, Roamer is the camping mattress you've always dreamed of. Self-inflating in seconds, Roamer offers individual comfort with the micro-adjustable Laylow valve. The soft, cozy 50D stretch fabric provides a soft surface to sleep in, while the durable 75D fabric underside allows it to be laid out on gravel, in a tent, in the back of your bus - or in your friend's guest room. And in keeping with NEMO's commitment to sustainability, the Roamer's fabrics are made from 100% recycled materials. When it's time to pack up, the Roamer Double's drain valve and innovative Flow Core channels make packing up a breeze. Get ready to sleep under the stars like never before. Comes with an oversized pannier for easy packing and an included Vortex ™ pump bag for additional inflation.
NEMO Roamer XL Wide - sleeping pad
When you want it all - luscious comfort and a size that feels like you're sleeping at home - the Roamer XL Wide from NEMO offers luxurious sleep on the go. With a small pack size (compared to the size of the mat), but still high and light, Roamer is the camping mattress you've always dreamed of. Self-inflating in seconds, Roamer offers individual comfort with the micro-adjustable Laylow valve. The soft, cozy 50D stretch fabric provides a soft surface to sleep in, while the durable 75D fabric underside allows it to be laid out on gravel, in a tent, in the back of your bus - or in your friend's guest room. And in keeping with NEMO's commitment to sustainability, the Roamer's fabrics are made from 100% recycled materials. When it's time to pack up, the Roamer XL Wide's drain valve and innovative Flow Core channels make packing up a breeze. Get ready to sleep under the stars like never before. Comes with an oversized pannier for easy packing and an included Vortex ™ pump bag for additional inflation.
Sea to Summit Camp Plus S.I. - Sleeping mat
Not only Sea to Summit believes that sleeping comfort is the most important task of a sleeping mat, because a perfect night's sleep also guarantees a carefree morning and ultimately a great day. At the same time, Sea to Summit is always working to optimize weight, product quality and packing volume without reducing comfort. Sea to Summit has therefore closely linked the self-inflating sleeping mat Camp Plus Self Inflatig to the air-sprung mats, which have set a new standard in outdoor sleeping comfort (at least according to STS, but we also think the mats are very successful). With the addition of self-inflating mats, the Sea to Summit range now covers both areas. From the ultra-light backpacker, for whom every gram counts, to the comfort sleeper who accepts a little more weight for a good night's sleep. The Camp Plus S.I. offers perfect Sea to Summit innovation and quality in a price-oriented self-inflating sleeping mat. Delta Coring removes over 40% of the foam to reduce weight and bulk without sacrificing durability. Large and thick all year round camping sleeping mat. Multifunctional valve for quick and easy inflation, deflation and fine adjustment of the air pressure. PillowLock ™ attaches an Eros pillow to the mat and holds it in place for a non-slip sleep.
From 85.96 € * 99.95 € *
Sea to Summit Camp Plus S.I. Rectangular sleeping mat
Not only Sea to Summit believes that sleeping comfort is the most important task of a sleeping mat, because a perfect night's sleep also guarantees a carefree morning and ultimately a great day. At the same time, Sea to Summit is always working to optimize weight, product quality and packing volume without reducing comfort. Sea to Summit has therefore closely linked the self-inflating sleeping mat Camp Plus Self Inflatig Rectangular to the air-sprung mats, which have set a new standard in outdoor sleeping comfort (at least according to STS, but we also think the mats are very, very successful). With the addition of self-inflating mats, the Sea to Summit range now covers both areas. From the ultra-light backpacker, for whom every gram counts, to the comfort sleeper who accepts a little more weight for a good night's sleep. The Camp Plus S.I. Rectangular offers perfect Sea to Summit innovation and quality in an affordable self-inflating sleeping mat. Delta Coring removes over 40% of the foam to reduce weight and bulk without sacrificing durability. Large and thick all year round camping sleeping mat. Multifunctional valve for quick and easy inflation, deflation and fine adjustment of the air pressure. PillowLock ™ attaches an Eros pillow to the mat and holds it in place for a non-slip sleep.
From 85.96 € * 99.95 € *
Sea to Summit EtherLite XT Extreme Women's - Sleeping Mat
With the EtherLite XT Extreme Women's, Sea to Summit sets a standard in the field of ultra-light and comfortable air mats. The EtherLite XT Extreme Women's combines a particularly light 30 / 40D nylon fabric with an Exkin Platinum (super light, almost noiseless material that gives the reflected heat back to the user) and a double layer of THERMOLITE insulation and Loop Baffle Air Sprung Cell construction. The result is a 10 cm thick, lightweight mat. One of the most important things about the EtherLite XT Extreme Women's is the Air Jump Cell technology. Instead of the usual partition wall construction, a spot-welded construction of interconnected chambers is used here, which forms a large-area matrix. Sea to Summit calls the chambers Air Jump Cell and they work like a pocket spring mattress: each chamber can be deformed as needed. It adapts perfectly to the body and ensures better pressure distribution. If you support yourself with your elbow, for example, the mat is only deformed at this point. In addition to the Air Sprung technology, the Ultralight Extreme Women's Mat, as the name suggests, offers insulation made of ThermoLite. In combination with the noiseless Exkin Platinium material (is a super light reflective material with a metallic surface), the insulated version offers a plus in the R-value and thus more protection from below. It offers the smallest pack size with excellent lying properties. To make inflation and deflation easier, Sea to Summit has developed a multifunctional 3-in-1 valve: the mat can be inflated quickly through the first, large opening without letting air escape. If you press something against it with your finger, air can be dosed out in order to maintain the optimum internal pressure. If you open both, the air can escape quickly and the thermal sleeping mat can be packed up faster. For the surface, Sea to Summit uses a 30 / 40D nylon ripstop material, which is provided with a TPU film on the outside. This makes the mat quiet, slip-resistant and, thanks to the included repair kit, can be quickly patched if necessary. Also included: a pack sack with which the mat can be inflated.
Sea to Summit EtherLite XT Extreme Rectangular - sleeping mat
With the EtherLite XT Extreme Rectangular, Sea to Summit sets a standard in the field of ultra-light and comfortable air mats. The EtherLite XT Extreme Rectangular combines a particularly light 30 / 40D nylon fabric with an Exkin Platinum (super light, almost noiseless material that gives the reflected heat back to the user) and a double layer of THERMOLITE insulation and Loop Baffle Air Jump Cell construction. The result is a 10 cm thick, lightweight mat. One of the most important things about the EtherLite XT Extreme Rectangular is the Air Jump Cell technology. Instead of the usual partition wall construction, a spot-welded construction of interconnected chambers is used here, which forms a large-area matrix. Sea to Summit calls the chambers Air Jump Cell and they work like a pocket spring mattress: each chamber can be deformed as needed. It adapts perfectly to the body and ensures better pressure distribution. If you support yourself with your elbow, for example, the mat is only deformed at this point. In addition to the Air Sprung technology, the Ultralight Extreme Rectangular Mat, as the name suggests, offers insulation made of ThermoLite. In combination with the noiseless Exkin Platinium material (is a super light reflective material with a metallic surface) the insulated version offers a plus in the R-value and thus more protection from below. It offers the smallest pack size with excellent lying properties. To make inflation and deflation easier, Sea to Summit has developed a multifunctional 3-in-1 valve: the mat can be inflated quickly through the first, large opening without letting air escape. If you press something against it with your finger, air can be dosed out in order to maintain the optimum internal pressure. If you open both, the air can escape quickly and the thermal sleeping mat can be packed up faster. For the surface, Sea to Summit uses a 30 / 40D nylon ripstop material, which is provided with a TPU film on the outside. This makes the mat quiet, slip-resistant and, thanks to the included repair kit, can be quickly patched if necessary. Also included: a pack sack with which the mat can be inflated.
Sea to Summit EtherLite XT Extreme - sleeping mat
With the EtherLite XT Extreme, Sea to Summit sets a standard in the field of ultra-light and comfortable air mats. The EtherLite XT Extreme combines a particularly light 30 / 40D nylon fabric with an Exkin Platinum (super light, almost noiseless material that gives the reflected heat back to the user) and a double layer of THERMOLITE insulation and Loop Baffle Air Jump Cell construction. The result is a 10 cm thick, lightweight mat. One of the most important things about the EtherLite XT Extreme is the Air Jump Cell technology. Instead of the usual partition wall construction, a spot-welded construction of interconnected chambers is used here, which forms a large-area matrix. Sea to Summit calls the chambers Air Jump Cell and they work like a pocket spring mattress: each chamber can be deformed as needed. It adapts perfectly to the body and ensures better pressure distribution. If you support yourself with your elbow, for example, the mat is only deformed at this point. In addition to the Air Sprung technology, the Ultralight Extreme Mat, as the name suggests, offers insulation made of ThermoLite. In combination with the noiseless Exkin Platinium material (is a super light reflective material with a metallic surface), the insulated version offers a plus in the R-value and thus more protection from below. It offers the smallest pack size with excellent lying properties. To make inflation and deflation easier, Sea to Summit has developed a multifunctional 3in1 valve: the mat can be inflated quickly through the first, large opening without letting air escape. If you press something against it with your finger, air can be dosed out in order to maintain the optimum internal pressure. If you open both, the air can escape quickly and the thermal sleeping mat can be packed up faster. For the surface, Sea to Summit uses a 30 / 40D nylon ripstop material, which is provided with a TPU film on the outside. This makes the mat quiet, slip-resistant and, thanks to the included repair kit, quickly patched if necessary. Also included: a pack sack with which the mat can be inflated.
Therm-a-Rest Trail Scout - sleeping mat
Therm-a-Rest's Trail Scout ™ is the perfect choice for beginners and anyone looking for something better than closed-cell foam. Provides indispensable convenience at an extremely affordable price, the compact size allows it to be taken anywhere. The foam core expands by itself, and the mat becomes individually firm with a few additional breaths. New WingLock ™ valve: a larger valve opening inflates the mat three times faster than the previous Therm-a-Rest valve. Unique design that prevents the air from escaping during inflation. A valve that can withstand the rigors of nature and cannot harm dust and dirt. Precisely shaped cap and intuitive handling ensure that the valve is as easy to use as the cap on a water bottle. To let the air escape from the mat, the valve is simply opened and the wings are rotated. The air escapes twice as fast as with the previous valve.
From € 73.09 * € 84.99 *
NEMO Tensor Alpine Insulated Mummy - sleeping mat
The sleeping pad Tensor Alpine Insulated Mummy is the ultimate backcountry adventurer's best friend and offers a calmer, supportive sleep with a small pack size. Updated with an adjustable flat-profile valve and the included Vortex pump bag, NEMO's lightweight sleeping pad uses high quality 20D fabrics to save weight without compromising sleeping comfort. Spaceframe Baffles provide unparalleled stability, weight distribution, and a quieter sleeping experience by using low-stretch, die-cut bracing to eliminate springiness and keep your elbows and hips from sagging to the ground. The insulated version is equipped with three layers of suspended Thermal Mirror metallized film, resulting in a lighter, remarkably quiet sleeping pad.
NEMO Tensor Alpine Insulated Rectangular - sleeping mat
The ultra-light sleeping pad Tensor Alpine Insulated Rectangular is the best friend of the ultimate backcountry adventurer and offers a calmer, supportive sleep in a small pack size. Updated with an adjustable flat-profile valve and the included Vortex pump bag, NEMO's lightweight sleeping pad uses high quality 20D fabrics to save weight without compromising sleeping comfort. Spaceframe Baffles provide unparalleled stability, weight distribution, and a quieter sleeping experience by using low-stretch, die-cut bracing to eliminate springiness and keep your elbows and hips from pushing all the way to the floor. The insulated version is equipped with three layers of suspended Thermal Mirror metallized film, resulting in a lighter, remarkably quiet sleeping pad.
NEMO Tensor Rectangular - sleeping mat
The ultra-light sleeping pad Tensor Rectangular is the best friend of the ultimate backcountry adventurer and offers a calmer, supportive sleep in a small pack size. Updated with an adjustable flat-profile valve and the included Vortex pump bag, NEMO's lightweight sleeping pad uses high quality 20D fabrics to save weight without compromising sleeping comfort. Spaceframe Baffles provide unparalleled stability, weight distribution, and a quieter sleeping experience by using low-stretch, die-cut bracing to eliminate springiness and keep your elbows and hips from pushing all the way to the floor.
NEMO Tensor Insulated Mummy - sleeping mat
The ultra-light sleeping pad Tensor Insulated Mummy is the best friend of the ultimate backcountry adventurer and offers a calmer, supportive sleep in a small pack size. Updated with an adjustable flat-profile valve and the included Vortex pump bag, NEMO's lightweight sleeping pad uses high quality 20D fabrics to save weight without compromising sleeping comfort. Spaceframe Baffles provide unparalleled stability, weight distribution, and a quieter sleeping experience by using low-stretch, die-cut bracing to eliminate suspension and keep your elbows and hips from sagging to the ground. The insulated version is equipped with two layers of suspended thermal mirror metallized film, resulting in a lighter, remarkably quiet sleeping pad.
NEMO Tensor Insulated Rectangular - sleeping mat
The ultra-light sleeping pad Tensor Insulated Rectangular is the best friend of the ultimate backcountry adventurer and offers a calmer, supportive sleep in a small pack size. Updated with an adjustable flat-profile valve and the included Vortex pump bag, NEMO's lightweight sleeping pad uses high quality 20D fabrics to save weight without compromising sleeping comfort. Spaceframe Baffles provide unparalleled stability, weight distribution, and a quieter sleeping experience by using low-stretch, die-cut bracing to eliminate springiness and keep your elbows and hips from pushing all the way to the floor. The insulated version is equipped with two layers of suspended thermal mirror metallized film, which results in a lighter, remarkably quiet sleeping pad.