The Sea To Summit Comfort Light Self-Inflating Sleeping Mat is a lightweight, backpacking option that offers superb comfort at a low weight and in a small packed size. The Delta Core technology removes 40% of bulk and weight without compromising on comfort. The multi-function valve flips over to allow fast deflation without fighting re-inflation as you go. This pad is a real alternative to air pads for many backpackers and campers who like to sleep comfortably.