The Dual Liner TravelSheet - RipStop Thermolite is the perfect way to keep warm on your next adventure. Thermolite is a hollow-core fiber that traps air for better insulation, this TravelSheet will make sure you're cozy no matter what the temperature is. The RipStop Silk side of the Dual Liner is also breathable and responds well to changing temperatures - it cools when you're warm and warms when you're cool. So whether you're headed to the mountains or the beach, this TravelSheet has got you covered. Thermolite Silkweight combines the advantages of ripstop silk (30%) and Thermolite EcoMade(70%) in a unique new ripstop fabric developed by Cocoon. It is even more lightweight and fast drying than pure Thermolite EcoMade. Thermolite EcoMade provides warmth and comfort at the lightest weight, even when wet. Its hollow-core fibers trap air for better insulation.