The two weigh almost the same, so this matchup comes down to one trade. The NEMO Tensor All-Season buys more warmth, while the Sea to Summit Ether Light XR Insulated buys more cushion, more inflation hardware, and a lower price.
| NEMO Tensor All-Season | Sea to Summit Ether Light XR Insulated | |
|---|---|---|
| GearScore | 84✓ | 84 |
| Warmth (R-value) | 5.4 R✓ | 4.1 R |
| Weight | 16.0 oz✓ | 16.6 oz |
| Warmth-to-weight | 1.19 R/100g✓ | 0.87 R/100g |
| Packed size | 2.08 L | 1.66 L✓ |
| Thickness | 3.5 in | 3.9 in✓ |
| Durability | 34 /100 | 39 /100✓ |
| Price | $220 | $189✓ |
| Features | 1Repair kit included | 3Pump sack included, Two-way valve, Repair kit included✓ |
| Type | Inflatable | Inflatable |
| Shape | Tapered | Tapered |
Highlighted cells mark the better spec: Tensor All-Season in blue, Ether Light XR Insulated in amber. A blank spec is never counted as a win. GearScore is the rating for the Overall use-case (0 to 100). Pick another above to re-score. Prices are current MSRP.
The Tensor All-Season and Ether Light XR Insulated weigh almost the same, so the choice is about season and setup more than pack weight. The Tensor All-Season is the warmer pad, built for cold-weather backpackers who want dependable 4-season insulation. The Ether Light XR Insulated is the more comfortable, better-equipped, cheaper pad, aimed at 3-season buyers who value plush cushion and easy inflation.
The numbers tell the story. The Tensor All-Season is warmer than the Ether, the gap between solid 4-season and 3-season warmth, though it costs a bit more. Weight is nearly a wash. The Ether answers with a touch more loft and a fuller kit (pump sack, two-way valve, repair kit) against the Tensor's repair kit alone, which means easier, drier inflation.
Pick the Tensor All-Season if warmth leads your list, whether that's winter trips, shoulder-season cold snaps, or just sleeping cold and wanting true 4-season insulation from its higher warmth. Pick the Ether Light XR Insulated if you camp mostly in three seasons and would rather have the extra cushion, the pump-sack-and-valve inflation setup, and a bit of money back in your pocket.
The NEMO Tensor All-Season, clearly. Its warmth outranks the Ether Light XR Insulated's, which is the practical difference between a solid 4-season pad and a 3-season one. If you're sleeping on cold ground, the Tensor holds more heat.
The Sea to Summit Ether Light XR Insulated. It ships with a fuller kit (a pump sack, a two-way valve, and a repair kit), while the Tensor All-Season includes just a repair kit. In practice that means faster, drier inflation and easier fine-tuning of firmness.
The Ether Light XR Insulated is the cheaper pad, and for 3-season use the case is strong. You also get a bit more thickness plus the extra inflation hardware. The catch is warmth. You give up the Tensor's four-season insulation for a three-season rating, so it's a poor trade for cold-weather trips.