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Sea to Summit Ascent Down Winter 15 Sleeping Bag

About This Item

Temp Rating

Below -5 Degrees

Insulation Type

Down

Our most versatile sleeping bag available. In colder temperatures you can cinch down the technical hood, zip up the draft-tube protected zippers and allow the 750+ Ultra-Dry Goose Down to keep you warm. In warmer conditions, the Free-Flow Zip system lets you unzip in different configurations for superior ventilation and even open up flat to turn the Ascent sleeping bag into a quilt on the warmest of nights.

Design and Details:

  • Technical warmth-retaining construction and high-lofting down, room to sleep comfortably, and unmatched ventilation make the Ascent sleeping bag an incredibly versatile backcountry bag
  • RDS-certified, 750+ fillpower goose down with a non-PFAS Ultra-Dry Down treatment to stay drier in damp conditions
  • Free-Flow Zip System offers excellent temperature regulation and multiple sleeping bag configurations
  • Thermally-efficient, more relaxed mummy fit, room in the hood to fit an Aeros pillow and the option to zip couple with a compatible Sea to Summit Women's bag to deliver space for two comes standard
  • Lightweight 20D recycled nylon shell with a non-PFAS DWR finish to protect against wind and moisture and a 20D recycled nylon liner for greater comfort
  • Box baffle construction throughout with vertical baffles in the torso to minimize down shift and maximize the retention of warmth
  • Sea to Summit Guarantee is offered for the Lifetime of this product
  • Brand : Sea to Summit
  • Country of Origin : Imported
  • Web ID: 23S2SALPNDWN15FSLCSL
  • SKU: 25757184
SizeRegularLong
ShapeMummyMummy
Temperature 15°F15°F
Best UseBackpackingBackpacking
Storage SackYesYes
Down rating750750
Max user height6 ft. 1 in.6 ft. 6 in.
Shoulder width62 in.66 in.
Hip width57 in.61 in.
Foot width47 in.51 in.
Compressed Volume7.5L8.0L
Compression Sack 13L13L
Fill Weight19.0 oz.21.8 oz.
Weight2 lb. 4 oz.2 lb. 8.8 oz.

REVIEWS

4.9

33 Reviews

Amazing Bag

[This review was collected as part of a promotion.] Soft, warm, and plenty of ways to vent to keep you comfortable in a wide range of temperatures. Only bag I use in temps 20'F +. Paired with the STS Ether Light XR, it's a hard sleep system to beat. To the company, great products, great service. . . thank you.

Amazing Sleeping Bag!

[This review was collected as part of a promotion.] I recently upgraded my sleep system and I chose the Ascent Down 15 F/ Regular as my sleeping bag. So far, I have taken it on multiple trips through snow and blizzards in both northern California and Colorado and it has performed amazingly. Things I like: - It packs down small, which for me was a big plus over my older, more bulky sleeping bag. The Ascent is small and light which has been a big plus for my backpacking. - The armholes - Waking up in the cold morning and having to get out of a warm sleeping bag has always been a bummer for me. However, with the ascent the snaps and zippers allow you to practically wear the sleeping bag, which has really added a layer of comfort to my mornings when I am out camping. - It's warm. So far it's kept me warm in conditions as low as 20 degrees Fahrenheit. I've really enjoyed snow camping with this bag this season, it's performed great within its rated temperature range. - Quality - The zippers are great and solid, the construction is clean and sturdy. I don't have anything that I don't like about this bag. For colder fall and mild winter/snow camping, this sleeping bag is great. However, I wouldn't push it past its rating. In conclusion, I am over the moon with this purchase and I am excited for the many adventures to come that this bag will accompany me on.

Wow!

[This review was collected as part of a promotion.] I love this bag. It has way more features than any other bag. Being able to stick your feet out the bottom and having zippers on both sides is awesome. I used the bag on a backpack trick and it pack small and was perfect for the season.

Nice Bag

[This review was collected as part of a promotion.] I'm really enjoying this bag. Packs small, and has good zipper placement for venting, sitting up, and even walking around. I tend to sleep on the cold side. I felt comfortable at about 45-50 degree temps. When it dropped below 40, I felt most comfortable with a 50 degree quilt thrown on top.

Go To Bag

[This review was collected as part of a promotion.] Great sleeping bag, perfect size to weight ratio. This is my new "go to" bag.

Ascent Down Sleeping Bag

[This review was collected as part of a promotion.] No review yet, backcountry trip in a few weeks The bag is definitely well made, expensive, but good things aren’t cheap and cheap things aren’t good

All I Ever Wanted!

[This review was collected as part of a promotion.] "Don't fence me in" as the song goes, and this awesome bag does NOT! Large zippered foot box allows my feet to be free! Zippered side vents for air, sweet air!! Snaps at shoulders that hold the bag (and excellent liner) up so you can make breakfast!!!! The hood is so cozy!! You will be able to customize your sleeping just like at home!! Leg out is too cold, but just the foot is perfect!!

Comfortable, Warm, Adjustable

[This review was collected as part of a promotion.] This is a great sleeping bag. Zipped up it is very warm, material is very comfortable and can be opened up when the conditions are warmer. Used in winter and summer

Great Sleeping Bag

[This review was collected as part of a promotion.] I'd highly recommend this sleeping bag! It’s very comfortable to sleep in, and I really appreciated the option to connect it to another bag. Plus, the design is great and it kept me warm throughout the night.

Love This Sleeping Bag. The

[This review was collected as part of a promotion.] Love this sleeping bag. The zipper in the foot box is great for cooling my hot feet.

Great Bag So Far! Very

[This review was collected as part of a promotion.] Great bag so far! Very warm and incredibly light. All the variations for air flow, capable of zipping to another bag is great

Ascent Sleeping Bag

[This review was collected as part of a promotion.] Best sleeping bag I’ve ever owned. I love the fact that both sides and feet unzip for ventilation. It fits just as the website said it did length wise, plenty of room for me being a larger guy. There is also a pocket inside that fits my phone perfect but if you had an iPhone max it probably wouldn’t fit

The Best Of The Best!

[This review was collected as part of a promotion.] Hands down the best sleeping bag on the planet. If I was ever cold this is the bag I would want with me. The packaging is great. It folds down so little so it can go anywhere. So lightweight and durable. 10 out of 10 hands down the best!! Very durable and comfortable.

A Fabulous Sleeping Bag

[This review was collected as part of a promotion.] As soon as you open the bag this feels like a high quality sleeping bag. The material is super soft and doesn’t sound scratchy so it’s not noisy when rolling over. The down lining is very warm so like it says it will be perfect for cold weather camping. The versatility of all of the zippers and openings make this not only a sleeping bag but a comfy blanket or almost coat that could be easily worn sitting by the campfire. I love the fact that it comes with both a compact bag for traveling and a storage bag as that allows for both easy travel and storage.

Warmth, Durability, Packability. 💚

[This review was collected as part of a promotion.] I recently received the Sea to Summit Ascent Down Sleeping Bag Unisex for free from Influenster in exchange for my honest review, and I couldn't be happier with it! No more renting gear when my husband and I go camping on Catalina Island or explore the parks in California. First and foremost, the comfort of this sleeping bag is unparalleled. It feels incredibly soft and cozy, ensuring a restful night's sleep even in cooler temperatures. The insulation is top-notch, keeping me warm without overheating, which is perfect for the varying climates we encounter on our trips. In terms of durability, the quality of the materials used is evident. It’s built to withstand the rigors of outdoor adventures and has held up beautifully against rough terrain and frequent use. Additionally, the sleeping bag's versatility is a huge plus. It adapts well to different sleeping conditions, making it a reliable companion whether we’re in a tent or under the stars. The packaging was also impressive. It came compactly packed, making it easy to store and transport without taking up too much space in our gear. Overall, I highly recommend the Sea to Summit Ascent Down Sleeping Bag for anyone looking to enhance their camping experience with comfort, durability, and versatility.

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