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. Here is the arithmetic, and how to run the same comparison on anyone else's quilt.

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. Hanging under a Hennessy? The Nest and Winter Nest are the underquilts cut for a Hennessy hammock.

Setting one up? See How to Hang a Hammock Underquilt, watch the setup videos, check which underquilt fits your hammock, or compare an underquilt vs. a sleeping pad. Building a kit from scratch? Start with the hammock camping gear checklist.

Sleeping warm takes insulation above you as well as below — pair one of these with a down top quilt. Or, if you want one quilt that works as an underquilt, a top quilt, a ground quilt and a wearable wrap, see our Multi-Function Quilts.