# Therm-a-Rest NeoAir XLite NXT vs Sea to Summit Ether Light XT Insulated: specs and price compared

A sourced, side-by-side comparison of the Therm-a-Rest NeoAir XLite NXT (Therm-a-Rest) and Sea to Summit Ether Light XT Insulated (Sea to Summit) among sleeping pads. Sea to Summit Ether Light XT Insulated is the cheaper of the two at $199.

## Side by side

| Spec | Therm-a-Rest NeoAir XLite NXT | Sea to Summit Ether Light XT Insulated |
| --- | --- | --- |
| US price | $210 | $199 |
| Brand | Therm-a-Rest | Sea to Summit |
| R value | 4.5 | 3.2 |
| Pad type | air | air |
| Weight grams | 370 | 490 |
| Thickness (cm) | 7.6 | 10 |
| Dimensions (cm) | 183 x 51 cm | 183 x 55 |
| Packed size (cm) | 23 x 10 cm | 24 x 11 |
| Insulation type | reflective-film | synthetic-fill |
| Inflation type | pump-sack | pump-sack |
| Shell denier | 30 | 30 |
| Shape | tapered | mummy |

## Key differences

- R value: Therm-a-Rest NeoAir XLite NXT 4.5 vs Sea to Summit Ether Light XT Insulated 3.2
- Weight grams: Therm-a-Rest NeoAir XLite NXT 370 vs Sea to Summit Ether Light XT Insulated 490
- Thickness (cm): Therm-a-Rest NeoAir XLite NXT 7.6 vs Sea to Summit Ether Light XT Insulated 10
- Dimensions (cm): Therm-a-Rest NeoAir XLite NXT 183 x 51 cm vs Sea to Summit Ether Light XT Insulated 183 x 55
- Packed size (cm): Therm-a-Rest NeoAir XLite NXT 23 x 10 cm vs Sea to Summit Ether Light XT Insulated 24 x 11
- Insulation type: Therm-a-Rest NeoAir XLite NXT reflective-film vs Sea to Summit Ether Light XT Insulated synthetic-fill
- Shape: Therm-a-Rest NeoAir XLite NXT tapered vs Sea to Summit Ether Light XT Insulated mummy

## What reviewers say

**Therm-a-Rest NeoAir XLite NXT** — Three whitelisted testers (CleverHiker, Switchback Travel, GearJunkie) field-tested the NeoAir XLite NXT and rate it a top ultralight three-season pad: 4.5 R-value at ~13 oz, highly packable (about a 1L Nalgene), and far quieter than the crinkly older XLite. All three flag the premium price. CleverHiker and GearJunkie also knock the pump sack; Switchback flags stiff, slippery baffles with slide-off and temperature-shift deflation. (3 sourced reviews.)

## Sources

- Therm-a-Rest NeoAir XLite NXT: https://cascadedesigns.com/en-eu/products/neoair-xlite-nxt-sleeping-pad (cascadedesigns.com, verified 2026-07-11)
- Sea to Summit Ether Light XT Insulated: https://seatosummit.com/pages/ether-light-xt-insulated-sleeping-pad (seatosummit.com, verified 2026-07-11)

Canonical: https://frontdeskreview.com/gear/sleeping-pads/therm-a-rest-neoair-xlite-nxt-vs-sea-to-summit-ether-light-xt-insulated/
Cite: Per The Front Desk Review, Therm-a-Rest NeoAir XLite NXT ($210) vs Sea to Summit Ether Light XT Insulated ($199) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/sleeping-pads/therm-a-rest-neoair-xlite-nxt-vs-sea-to-summit-ether-light-xt-insulated/
License: CC BY 4.0.