Therm-a-Rest Trail Lite Mattress Regular Versatile: Light enough for backpacking, yet comfortable and durable enough for car camping Warm: Ample warmth for extended, three-season use Packs Small: Self-inflating die-cut foams roll up small for easy packing Lasting Comfort: Time-tested design offers the straightforward comfort and performance you need for a great night's rest R-Value: 3.4