Thermarest NeoAir Xlite Sleeping Pad 30d Rip Nylon Made in USA Advanced fabrics and a tapered design make this the lightest 3-season backpacking air mattresses available, with no peer in its warmth-to-weight ratio. Patent-pending, reflective ThermaCapture technology traps radiant heat while Triangular Core Matrix construction minimizes convective heat loss-all without the bulk, weight or durability issues of down and synthetic fills. 2.5" (6 cm)-thickness and baffled internal structure provide unrivaled stability and support. Low-bulk materials make the XLite mattress the most compact NeoAir mattress ever - as packable as a water bottle.