The Sea To Summit Ultralight Self Inflating is a compact and lightweight sleeping mat. The construction of BodyZone punched foam provides optimized heat in important parts of the mat and minimal weight in other parts of the mat. Anti-slip print on the surface and on the floor keeps the sleeping bag and mat in place. Multi-functional, high flow-rate valve for easy filling, disposable deflation (ensures that the mat cannot refill itself while being rolled up) and fine tuning for comfort.