Hammock Underquilts

Jacks R Better invented the hammock underquilt in 2004 — still the warmest, most reliable way to beat the cold air beneath you, with no crushed insulation and no cold spots. Every underquilt here is purpose-built for the job, hanging below your hammock to trap a warm layer of air that your body weight can never compress. 850FP RDS-certified down behind our wind-resistant Ion 1.1 shell, 20° to 0°, hand-sewn in Pennsylvania.

Every one of them ships with more down than its rating requires — the overfill other makers sell by the ounce, included as standard and never an upcharge. How much more depends on the baffle: 36% above base fill rate in our Dual Differential Contoured Radial models, 25% in the box-baffle Nests. Each product page publishes its base fill rate, its total fill weight and the exact figure, so you can run a like-for-like comparison against anyone.

Not sure which underquilt is right for you? Read our Best Hammock Underquilts guide, or match your coldest night with our Hammock Underquilt Temperature Guide.

Setting one up? See How to Hang a Hammock Underquilt, check which underquilt fits your hammock, or compare an underquilt vs. a sleeping pad.

Want one quilt that works as an underquilt, a top quilt, a ground quilt and a wearable wrap? See our Multi-Function Quilts.