How to Choose Sleeping Bags for Backpacking
Sale Ends Sep 1
Sea to Summit Ascent 30F Sleeping Bag
Sale Ends Sep 1
$321.69 – to $344.19Save up to 25%
Stay warm in changing backcountry conditions with the Sea to Summit Ascent 30F sleeping bag. It's equipped with high-loft down, roomy heat-retaining construction and excellent ventilation.
Key Details
Fill
750+ fill-power goose down
Weight
Regular: 1 lb. 11.6 oz.
Long: 1 lb. 15 oz.
Compressed Volume
Regular: 5.5 liters
Long: 6.4 liters
Temperature Rating (F)
30 degrees (F)
- 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 turn the bag into a quilt
- You can even close the snaps at the shoulders, open the footbox zipper and wear the Ascent at camp
- Thermally efficient, relaxed mummy fit with room in the hood to fit an Aeros pillow (not included)
- Option to zip-couple with a compatible Sea to Summit sleeping bag for space for two
- Lightweight, 20-denier recycled nylon shell with a non-PFAS durable water repellent (DWR) finish to protect against wind and moisture
- 20-denier recycled nylon liner for greater comfort
- RDS-certified, 750+ fill-power goose down with a non-PFAS Ultra-Dry Down treatment to stay drier in damp conditions
- Box baffle construction throughout with vertical baffles in the torso to minimize down shift and maximize warmth retention
- Free Flow Zip System offers excellent temperature regulation and multiple sleeping bag configurations
- Sea to Summit Guarantee is offered for the lifetime of this sleeping bag
Imported.
Temperature ratings are intended as a guideline to help you compare products, rather than a guarantee of warmth, since many different factors contribute to your comfort while you sleep. Backpacking bags are typically rated for temperature according to an independent testing protocol—currently International Organization for Standardization (ISO) 23537, though some older items followed European Norm (EN) 13537. Testing is based on a person wearing one base layer and a pair of socks, sleeping on an insulated surface with a minimum R-value of 5.38.
Each bag then gets 2 ratings: the Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower Limit rating is the lowest temperature at which the bag will keep the average "warm sleeper" comfortable. Some brands determine their own temperature rating by aligning to the Comfort rating for women’s bags, to the Lower Limit rating for men’s bags, or somewhere in the middle for nongendered bags.
View all Sea to Summit Backpacking Sleeping BagsEach bag then gets 2 ratings: the Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower Limit rating is the lowest temperature at which the bag will keep the average "warm sleeper" comfortable. Some brands determine their own temperature rating by aligning to the Comfort rating for women’s bags, to the Lower Limit rating for men’s bags, or somewhere in the middle for nongendered bags.
| Best Use | Backpacking |
|---|---|
| Tested Lower Limit | 30 degrees (F) - ISO |
| Tested Comfort | 38 degrees (F) - ISO |
| Temperature Rating (F) | 30 degrees (F) |
| Temperature Rating (C) | -1 degrees (C) |
| Weight | Regular: 1 lb. 11.6 oz. Long: 1 lb. 15 oz. |
| Shell | 100% RCS recycled nylon |
| Zipper Location | Left/Right |
| Insulation Type | Down |
| Water-Resistant Down | Yes |
| Fill | 750+ fill-power goose down |
| Fill Weight | Regular: 10.6 ounces Long: 12.1 ounces |
| Sleeping Capacity | 1-person |
| Lining | 100% RCS recycled nylon |
| Sleeping Bag Shape | Mummy |
| Fits Up To (in.) | Regular: 72.5 inches Long: 77.5 inches |
| Shoulder Girth (in.) | Regular: 62.2 inches Long: 66.1 inches |
| Hip Girth (in.) | Regular: 57.5 inches Long: 61.4 inches |
| Stuff Sack Volume | 8 liters |
| Compressed Volume | Regular: 5.5 liters Long: 6.4 liters |
| Gender | Unisex |
| Sustainability | Down certified to the Responsible Down Standard (RDS) Contains recycled materials |
Buying Advice
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Customer Images
indiab19
A fabulous sleeping bag
1 year ago
[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.
Originally posted on influenster.com
Anonymous
Warm but folds super small!
1 year ago
[This review was collected as part of a promotion.] This sleeping bag is incredible! I’ve never had such a light bag before. I’m so used to those horrible thick flannel sleeping bags, but this bag is filled with down and can squish down to be super small and compact. it is absolutely perfect for backpacking because it is so small. What’s crazy is that it keeps you incredibly warm and you don’t sweat! No thick material, just high-quality down feathers keeping you insulated and warm. Love the mummy shape too as there’s no excess pointless fabric to worry about.
Originally posted on influenster.com
tomgs
Super warm, cozy and lightweight!
1 year ago
[This review was collected as part of a promotion.] I’ve used this sleeping during winter and still using in Utah. Lastly, I camped at Zion and I had a great experience for all of my stays. Firstly, the size is super good, I’m 5’5, 140lb and I still have a lot of room. The sleeping bag is really easy to pack and carry and as a plus lightweight! I didn’t have any problem while hiking it too. It incredibly soft and you can use the zipper to open anywhere. When I wake up I usually just wanna keep my feet open, and with this bag, I can do that easily just by using the zipper for the feet! So far, after camping in the wild, nothing happened to it, so it is durable and deserves the money. I am kind of a person who is cold all the time but after starting to use this sleeping bag, I don’t get cold at nights but I have to add, I use my sleeping pad under my sleeping bag, this couple is like the perfect combo! I can’t wait to use it more!! Highly highly recommended!
Originally posted on influenster.com
mckennaf8
Best sleeping bag ever!
1 year ago
[This review was collected as part of a promotion.] This is the best sleeping bag ever! It’s super warm and i love how it has a hood arm holes and feet holes so you can walk around while wearing it. It packs down super nicely for backpacking and i love that you can zip two of them together as well. I’ve never had a nice sleeping bag but let me tell you this is so worth the price to actually be warm while camping or backpacking.
Originally posted on influenster.com
girl_with_1eye
Amazing Sleeping bag!!
1 year ago
[This review was collected as part of a promotion.] What an amazing sleeping bag!! It is so so warm, fluffy, and long! It really is super comfy to be bundled up in and I love that it has space to stretch out in. It is super easy to roll up into the case. I love that they not only included the case for it but also a smaller case that can be strapped onto a backpack! Great item! Camping season can’t come soon enough!
Originally posted on influenster.com
unevergno
So Warm and Snug
1 year ago
[This review was collected as part of a promotion.] Received this free from Influenster to review and give honest feedback. I am so looking forward to camping now. Not that I wasn't before, but this little baby is going to keep me warm. It fits like no other sleeping bag I have ever owned. So soft and comfortable. Filled with down, has a hoodie and the feet open up if I get too warm. Everything I could have asked for. Thanks to @influenster and @seatosummit for the opportunity to test this quality product.
Originally posted on influenster.com
akat21
The best of the best!
1 year ago
[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.
Originally posted on influenster.com
janjadav
Must Have
1 year ago
[This review was collected as part of a promotion.] I am shocked at how soft and light this sleeping is. It keeps me warm and never gets hot. My body easily regulates its temperature. The bag is easy to fold up and place in its bag, which allows for the drying of material.
Originally posted on influenster.com
jessicaann1990
Good product
1 year ago
[This review was collected as part of a promotion.] So this thing is comfortable and large. My husband is 5’11” and he has his arms extended all the way up so plenty of room. It’s insulated good and easy to put back in its bag.
Originally posted on influenster.com
ellepea
Awesome Sleeping Bag 👏
1 year ago
[This review was collected as part of a promotion.] I am so grateful to have received such a nice sleeping bag! It is VERY lightweight, super easy to pack up, and fluffs up in no time. I can't wait to use it on a camping trip!
Originally posted on influenster.com
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