Forty years ago, Therm-a-Rest patented the first self-inflating mattress and introduced the world to a new level of backcountry comfort. Therm-a-Rest is celebrating their anniversary with a limited edition mattress featuring the original logo and colors. The 40th Anniversary Edition mattress may look like a throwback to their first Therm-a-Rest mattress, but it features cutting-edge technology that offers excellent comfort, packability and 4-season warmth. The foam in this mattress is the lightest, most compressible foam Therm-a-Rest ever used, allowing greater comfort without additional weight or bulk. Stuff sack and repair kit included.