For the ultralight enthusiast, the Ultralight Self Inflating mat adds the promise of a comfortable sleep to your pack, and not a whole lot of weight or bulk. Delta Core-V technology is used to remove small sections of foam without sacrificing comfort. The silicone grip print ensures you and your sleeping bag stay on the mat. Packing the mat up is super easy with the patent pending multi function valve that allows you to roll up the mat without the mat re-inflating