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Highlights
SECOND SUMMIT: Let's give gear a second chance. Shop our expertly inspected, pre-owned gear delivered to you in like new condition and protected by the Sea to Summit Guarantee.
BEST USE: Backpacking
PERFORMANCE: 2.5 Season
WEIGHT: 1lb 14.3oz | 860g
COMPRESSED VOLUME: 4.9 liters
LOWER TEMP RATING: 25°F | -4ºC
Description
The Ascent down mummy sleeping bag redefines the meaning of versatile. Complex construction and high-quality down keep you warm when it's cold outside, while the triple-zipper Free-Flow Zip system ensures you stay...
Product Details
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The EN Rating scale is a scientific test to determine the warmth of a sleeping bag. The test produces a Lower rating (for male sleepers) and a Comfort rating (for female sleepers). Both are listed in the features table on the product page.
A unisex sleeping bag with a Lower limit of 14ºF means a man should be comfortable down to air temperatures of 14ºF. The same bag will also have a Comfort limit, in the realm of 27°F, so a woman would be comfortable down to an air temperature of 27ºF. These ratings require a sleeping mat with an R-Value appropriate for expected ground temperatures – without this, the sleeping bag itself is unlikely to keep the sleeper warm enough.
A variety of factors impact sleeping bag warmth - the above temperatures are merely guidelines, not guarantees. It’s important to think of a sleeping bag, an appropriately insulating sleeping pad and a liner as a sleep system. For example - if you plan on sleeping in nighttime air temperatures of 27ºF / -3°C, choose a bag with a gender-appropriate rating of 23°F / -5°C, plus a sleeping mat with an R-Value of 2.5 to 3, and consider a Reactor thermal liner.
![25 || Ascent Down Sleeping Bag Regular](http://seatosummit.com/cdn/shop/files/AscentRegular25F_ec18ab9e-251d-42ff-a05e-f333d0b4c2ac.jpg?crop=center&height=120&v=1715279429&width=120)
![Description || Ascent Down Sleeping Bag](http://seatosummit.com/cdn/shop/files/STS-Description-image-Ascent.jpg?v=1715279431&width=1500)
Description
The Ascent down mummy sleeping bag redefines the meaning of versatile. Complex construction and high-quality down keep you warm when it's cold outside, while the triple-zipper Free-Flow Zip system ensures you stay cool and ventilated when the weather warms.
Shaped to allow a natural sleeping position for comfort, while light and compact enough to go anywhere.
Tech specs
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Best UseBackpacking
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Comes WithUltra-Sil™ compression bag and storage cell
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InsulationUltra-Dry Down 750+ Loft
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ShapeRelaxed Mummy
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Shell FabricLightweight 20D Nylon Shell
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Zip OptionsFree-Flow zipper system
25°F Regular | 25°F Long | 15°F Regular | 15°F Long | 0°F Regular | 0°F Long |
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