NEMO Tensor Alpine
Best warmth to weight
Model: Tensor Alpine
One tester slept on the Tensor Alpine for a two-week trip around Quebec’s Gaspé Peninsula and says it was the most supportive pad she’d ever used. Credit polyester “trusses” on the interior that connect the top and bottom of the pad, improving stability.
NEMO doesn’t release R-values, but thanks to a triple layer of metallic film that retains and reflects your body heat, this pad kept one guide warm on -5°F nights on Canada’s 19,551-foot Mt. Logan in a subzero bag.
When rolled up, the Tensor Alpine is a smidge taller—but skinnier—than a 1-liter Nalgene, the best size-to-warmth ratio in the test.
Testers used the included stuff sack to blow up the bag in three minutes.