# Sea to Summit Ether Light XT Insulated vs Exped Ultra 6.5R: specs and price compared

A sourced, side-by-side comparison of the Sea to Summit Ether Light XT Insulated (Sea to Summit) and Exped Ultra 6.5R (Exped) among sleeping pads. Sea to Summit Ether Light XT Insulated is the cheaper of the two at $199.

## Side by side

| Spec | Sea to Summit Ether Light XT Insulated | Exped Ultra 6.5R |
| --- | --- | --- |
| US price | $199 | $199.95 |
| Brand | Sea to Summit | Exped |
| R value | 3.2 | 6.9 |
| Pad type | air | air |
| Weight grams | 490 | 440 |
| Thickness (cm) | 10 | 9 |
| Dimensions (cm) | 183 x 55 | 183 x 52 |
| Packed size (cm) | 24 x 11 | 23 x 11 |
| Insulation type | synthetic-fill | synthetic-fill |
| Inflation type | pump-sack | pump-sack |
| Shell denier | 30 | 20 |
| Shape | mummy | rectangular |

## Key differences

- R value: Sea to Summit Ether Light XT Insulated 3.2 vs Exped Ultra 6.5R 6.9
- Weight grams: Sea to Summit Ether Light XT Insulated 490 vs Exped Ultra 6.5R 440
- Thickness (cm): Sea to Summit Ether Light XT Insulated 10 vs Exped Ultra 6.5R 9
- Dimensions (cm): Sea to Summit Ether Light XT Insulated 183 x 55 vs Exped Ultra 6.5R 183 x 52
- Packed size (cm): Sea to Summit Ether Light XT Insulated 24 x 11 vs Exped Ultra 6.5R 23 x 11
- Shell denier: Sea to Summit Ether Light XT Insulated 30 vs Exped Ultra 6.5R 20
- Shape: Sea to Summit Ether Light XT Insulated mummy vs Exped Ultra 6.5R rectangular

## Sources

- Sea to Summit Ether Light XT Insulated: https://seatosummit.com/pages/ether-light-xt-insulated-sleeping-pad (seatosummit.com, verified 2026-07-11)
- Exped Ultra 6.5R: https://www.exped.com/en/products/sleeping-mats/ultra-65r (exped.com, verified 2026-07-11)

Canonical: https://frontdeskreview.com/gear/sleeping-pads/sea-to-summit-ether-light-xt-insulated-vs-exped-ultra-6-5r/
Cite: Per The Front Desk Review, Sea to Summit Ether Light XT Insulated ($199) vs Exped Ultra 6.5R ($199.95) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/sleeping-pads/sea-to-summit-ether-light-xt-insulated-vs-exped-ultra-6-5r/
License: CC BY 4.0.