Big Agnes Torchlight EXP Sleeping Bag vs Rab Neutrino 400 Sleeping Bag

The Rab Neutrino 400 is the warmer and lighter bag for its warmth, with 800-fill goose down and a -7C rating against the Torchlight's 0F (about -18C) rating, but the Big Agnes Torchlight EXP is the more flexible bag because its expandable side panels widen the shoulder and hip girth for side sleepers and bulky layers. The Torchlight's 650-fill Downtek down and recycled 20D fabrics are solid and PFC-free, and owners like the adjustable width, though it is heavier and bulkier packed. The Neutrino's tapered cut, trapezoid box baffles and insulated 3/4 zip draw praise from mountaineers for warmth-to-weight, but the snug fit feels tight for broad or restless sleepers.

• Choose the Big Agnes Torchlight EXP if you sleep on your side or move a lot and want a bag you can widen at the shoulders and hips, and you value PFC-free Downtek down over maximum warmth-to-weight.
• Choose the Rab Neutrino 400 if you want a light, warm bag for cold mountain trips and prefer 800-fill goose down with a close, efficient cut.