tldr; Popular budget-friendly down bag with 750FP RDS-certified down. Available in 18F, 25F, and 32F ratings. Weighs 2lb 1oz for the 18F version. Runs 5-10F warmer than rated. Reliable gateway to lightweight down for beginners.
Check pricesBest praise vs top criticism for Sea to Summit Trek
“The Sea to Summit Trek is a solid budget down bag. Not cottage-quilt light, but reliable and available at REI.”
1,269 Reddit opinions analyzed • Last updated 2/24/2026