The Genesis Sleeping Bag exemplifies ALPS Mountaineering's commitment to be good stewards of the Earth's resources by following our R3 principal of Reduce, Reuse, Recycle. The outer fabric is constructed entirely of recycled polyester ripstop fabric. The inner fabric is also recycled polyester fabric. The two-layer design is separated with Recycled TechLoft Micro Insulation. By choosing the Genesis you will stay warm and sleep easy knowing that your sleeping bag choice was not only perfect for your comfort but also a responsible choice for our environment.