The Alps lightweight, self-inflatable seat pad is perfect for break time on the trail, at the park and anywhere else you might need a dry, comfortable place to sit. Polyurethane open-cell foam packs light and compact to fit in your day bag or backpack. Self-inflating-simply open valve and roll out pad top off with a few short breaths to increase firmness noncorrosive nylon valve seals tight to prevent leaks. Diamond-ripstop top and polyester taffeta bottom provide lightweight durability. Stuff sack and repair kit included. Special buy.