The Sea To Summit Ultralight Insulated Mat is a dual insulated sleeping mat that's perfect for ultralight backpacking and bike touring in cooler weather. It's the golden child of backpacking sleeping mats, showing that you don't have to compromise weight for comfort. THERMOLITE insulation - prevents air circulation and heat loss due to convection Exkin Platinum fabric - reflects your body heat back to you Air Sprung Cells - high surface area matrix of interconnected chambers, where each cell moves independently; as a result, this mat will conform to your body shape, while feeling softer and more comfortable thanks to better pressure dispersal 40D Ripstop Nylon outer - a fabric that balances weight and durability TPU laminate - eliminates delamination, reducing slippage and increasing anti-puncture strength Antimicrobial treatment - prevents issues caused by warm, moist air becoming trapped inside the mat Multifunction valve - connects all layers and ensures that the mat can be easily inflated, precisely tuned, and quickly deflated without needing to use multiple bulky valves. Stuff sack - secures your mat for easy transport and storage Integrated Airstream Pu