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Sea to Summit Ether Light XT Review
Looking for a plush, ultralight sleeping pad for side sleepers and comfort seekers? In this Sea to Summit Ether Light XT review, we break down why this 4-inch thick inflatable pad is a favorite for 3-season backpackers prioritizing luxury without bulk.
The Sea to Summit Ether Light XT Insulated sleeping pad is built with Air Sprung Cell™ construction for pillow-like comfort and stability. At 4 inches thick and filled with dual-layer THERMOLITE® insulation, it delivers warmth and support in temperatures down to freezing (R-value ~3.5). The pad weighs around 17 oz (regular) and packs down small, making it a top choice for hikers who want comfort without sacrificing space.
Its 30D/40D nylon construction with an anti-microbial TPU laminate offers durability and resistance to mold and mildew. The pad includes a multi-function valve for quick inflation/deflation and comes with an Airstream™ pump/stuff sack for easy setup in the field.
Key Specifications
| Weight | 17 oz (regular) |
| R-Value | 3.5 |
| Thickness | 4 inches |
| Packed Size | 9 x 4.3 inches |
| Inflation Valve | Multi-function valve with Airstream™ pump sack |
| Material | 30D/40D nylon with TPU laminate |
| Sizes Available | Small, Regular, Large, Women’s Regular |
Comparisons
Sea to Summit Ether Light XT vs. Therm-a-Rest NeoAir XTherm NXT
The Therm-a-Rest NeoAir XTherm NXT is built for extreme cold with an impressive R-value of 7.3 and an ultralight weight of just 15 oz, making it one of the top choices for winter backpackers and alpine climbers. In contrast, the Sea to Summit Ether Light XT prioritizes plush comfort with 4 inches of cushioning and a more luxurious feel. While it is slightly heavier and has a lower R-value of 3.5, it’s ideal for side sleepers and those who want a softer sleep surface for 3-season trips. Choose the XTherm NXT for serious warmth and efficiency, and the Ether Light XT for superior comfort in milder conditions.
Sea to Summit Ether Light XT vs. Nemo Tensor Insulated
The Nemo Tensor Insulated sleeping pad weighs about 15 oz and features a 3-inch thickness, offering a solid balance of weight, comfort, and quiet sleep. The Sea to Summit Ether Light XT is slightly heavier but delivers more comfort with its 4-inch thickness and Air Sprung Cell™ design, which better mimics a traditional mattress feel. Both pads are designed for 3-season use, but the Ether Light XT is more geared toward side sleepers and campers who want plushness above all else. The Nemo Tensor Insulated stands out for its near-silent materials and slightly more compact packed size, making it a strong contender for ultralight backpackers who value a quieter night’s rest.
Pros & Cons Summary
| Feature | Ether Light XT | NeoAir XTherm NXT | Nemo Tensor Insulated |
|---|---|---|---|
| Weight | ❌ Slightly heavier (17 oz) | ✅ Ultralight (15 oz) | ✅ Lightweight (~15 oz) |
| R-Value | ✅ Good for 3-season (3.5) | ✅ Excellent (7.3) | ✅ Moderate (3.5) |
| Comfort | ✅ Plush and 4 inches thick | ✅ Supportive but thinner | ✅ Stable and quiet |
| Packed Size | ✅ Compact (9 x 4.3″) | ✅ Very compact | ✅ Very compact |
| Durability | ✅ TPU laminate, anti-microbial | ✅ Rugged bottom nylon | ✅ Strong construction |
| Best For | Comfort-focused 3-season trips | Winter/alpine backpacking | Quiet, ultralight 3-season hiking |
Looking for a different sleeping pad for your trip? View our Best Sleeping Pads guide for more options.
Frequently Asked Questions
Is the Ether Light XT good for side sleepers?
Yes, the 4-inch thickness and Air Sprung Cell™ design make it one of the best sleeping pads for side sleepers who want more cushioning.
Does it come with a pump sack?
Yes, it includes the Airstream™ pump sack built into the stuff sack for fast, easy inflation.
Can it be used in cold weather?
It’s suitable for 3-season use, but not recommended for winter camping below freezing for extended periods.
Is it noisy when you move around on it?
No, it’s one of the quieter inflatable pads available, especially compared to older models with crinkly materials.
How packable is it?
It packs down to about 9 x 4.3 inches, making it easy to store in your backpack.
Final Thoughts
The Sea to Summit Ether Light XT delivers excellent comfort, especially for side sleepers and comfort-focused trekkers. While it isn’t the warmest or lightest pad out there, its plush thickness, quiet fabric, and solid 3-season performance make it one of the most comfortable options in its class.
