Nemo's Tensor Extreme Conditions sleeping mat has a whopping 8.5 R-value thanks to the multiple insulating layers of reflective ultra-thin metallized film suspended inside the baffles. Incredibly light for the warmth it offers, the pad is quiet (no crinkly sounds when you move) and very comfortable. The interior baffle design gives stable support without the wobbly waterbed feeling some air mattresses give you, and the rectangular design allows you to move your feet around without contacting the cold ground.

The mat is made with 20D (top) and 40D (bottom) nylon for durability, and a repair kit is included. Also included is a pump sack which provides fast inflation and attaches easily to the pad's zero-profile, microadjustable valve. The valve is also designed to work well in cold temperatures.

R-value: 8.5 
Weight: 710 g (Reg Wide), 746 g (Long Wide)
Thickness: 9 cm (3.5")
Packed size: 27 x 11 cm (Reg Wide), 27 x 12 cm (Long Wide)