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Curry and SonsTrading Company · Est. 1995
Sea to Summit Ether Light XR Insulated Sleeping Pad

A 4-inch insulated air pad with an R-value of 4.1 and a cushy, cell-style surface. People pick it for comfort, especially side sleepers.

Specs

  • R-value: 4.1
  • Thickness: 10 cm / 3.9 in
  • Weight: 470 g / 16.6 oz (Regular); packed 525 g
  • Size: 72 x 22 in (Regular)
  • Packed size: 8 x 4 x 4 in
  • Pump sack built into the stuff sack
  • Price: $189 (maker, Oct 2026)

What reviewers say

CleverHiker's 2026 guide calls it a comfortable, durable pad. Testers liked the thick cushioning for side sleepers, easy inflation and firmness adjustment, and good three-season warmth. They note it is heavier than premium lightweight pads, not warm enough for true winter, can feel clammy on bare skin, and the pump sack can pop off the valve.

Good

  • Very comfortable for side sleepers
  • Durable for an air pad
  • Easy to inflate and adjust

Not so good

  • Heavier than top ultralight pads
  • Not a winter pad

Who it's for

Backpackers and campers who put comfort first on three-season trips. Gram counters and winter campers should look elsewhere.

Sources

Last checked 2026-10-19. Specs from the maker; review notes summarized in our own words.