Choosing the right winter sleeping pad is crucial for a comfortable and warm backpacking experience. This detailed comparison pits two industry giants against each other: the Thermarest and the Sea to Summit. Both offer impressive insulation for frigid temperatures, but their designs and features differ significantly, impacting weight, packability, comfort, and durability. This review dives deep into the specifics of each pad, examining key factors like R-value, weight, pack size, comfort levels, and valve systems to help you determine which option best suits your needs.We'll explore the advantages and disadvantages of each pad, weighing the trade-offs between superior thermal performance and lighter weight versus enhanced comfort and convenience features. Ultimately, the "best" pad is subjective, depending on your priorities as a backpacker. Whether you prioritize minimizing pack weight, maximizing warmth, or prioritizing comfort during your winter adventures, this comparison will provide the information you need to make an informed decision.
Pros And Cons
- More comfortable than the Thermarest, especially for side sleepers (thicker, air pockets).
- Includes a pump sack that doubles as a compression bag.
- Pillow lock system included.
- Various sizes available (regular, wide, mummy, rectangular).
- Larger pack size than the Thermarest.
- Heavier than the Thermarest (720g).
- R-value of 6.2 (still good for winter conditions).
- Basic valve with less control than Thermarest's WingLock valve.
- 40 denier nylon on the bottom (less durable than Thermarest).
- Less than half the size of the Sea to Summit pad.
- 440g (regular size), lighter than the Sea to Summit.
- R-value of 7.3 (industry leader).
- Includes a pump sack.
- WingLock valve allows for pressure adjustment.
- 70 denier nylon on the bottom for durability.
- Significantly quieter than previous versions.
- Less comfortable than the Sea to Summit for side sleepers.
- Doesn't include a pillow lock system.
Read more: Choosing the Best Sleeping Pad for Camping & Backpacking Adventures
Pack Size and Weight
One of the first considerations for any backpacking gear is pack size and weight. The Thermarest, surprisingly, packs down to less than half the size of the Sea to Summit, despite offering superior thermal efficiency. This is a significant advantage, especially during winter trips when space is at a premium.
Weight is another crucial factor. The Thermarest weighs in at 440g (regular size), while the Sea to Summit tips the scales at 720g – a 63% difference. The Thermarest’s lighter weight and smaller pack size make it a more appealing option for those prioritizing pack weight.
R-Value and Thermal Performance
R-value is a measure of a sleeping pad’s ability to insulate against cold ground. The Thermarest boasts an impressive R-value of 7.3, currently leading the industry for pads in its weight class. This guarantees exceptional warmth in freezing conditions.
The Sea to Summit, with an R-value of 6.2, still provides excellent insulation for winter use. Anything above 6 is generally considered sufficient for cold weather camping, though the Thermarest clearly edges out the competition in this area.
Inflation and Comfort
Both pads come with a pump sack, simplifying inflation. The Sea to Summit’s pump sack doubles as a compression sack, which is a convenient design feature. Inflation with either pump sack only takes a few pumps.
Comfort is subjective, but the Sea to Summit's extra thickness (4 inches vs. 3 inches for the Thermarest) and air pockets offer superior comfort. The reviewer, a heavy side sleeper, found the Sea to Summit significantly more comfortable, reducing pressure points and improving sleep quality.
Pillow Lock and Valve Systems
The Sea to Summit includes a Velcro pillow lock system, preventing pillow slippage during sleep. This is a valuable feature for restless sleepers and greatly enhances sleep quality. The Thermarest lacks this feature.
The valve systems differ. The Sea to Summit employs a standard open/close valve, while the Thermarest utilizes its patented WingLock valve. The WingLock offers easier inflation/deflation, especially with gloves, and allows for subtle pressure adjustments during the night.
Durability and Noise
Both pads feature 30-denier nylon tops for tear resistance. However, the Thermarest's 70-denier bottom provides superior abrasion resistance compared to the Sea to Summit's 40-denier bottom, making it more durable overall.
Noise levels are comparable in this iteration of the Thermarest. The previous model was notoriously noisy, but improvements have significantly reduced this issue. Both pads are now relatively quiet.
Size Options and Conclusion
Both pads offer regular, wide, mummy, and rectangular shapes. Rectangular pads are recommended for restless sleepers to prevent rolling off during the night.
The Thermarest excels in pack size, weight, R-value, and valve design. The Sea to Summit wins in comfort due to its greater thickness and air pockets. Ultimately, the best pad depends on individual needs and preferences. The reviewer personally prefers the Sea to Summit for its superior comfort, despite the Thermarest's superior technical specs.