How to Choose Sleeping Bags for Backpacking
Sea to Summit Trek 0F Sleeping Bag
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The flexibility of the Free-Flow Zip System—which lets you use it a quilt or wear it—plus its roomy shape make the Sea to Summit Trek 0F sleeping bag a comfy choice in cold conditions.
Shop similar productsKey Details
Fill
650+ fill-power duck down
Temperature Rating (F)
0 degrees (F)
- RDS-certified, 650+ fill-power duck down with a non-PFAS Ultra-Dry Down treatment to stay drier in damp conditions
- Recycled 20-denier polyester shell with a non-PFAS durable water repellent (DWR) finish blocks wind and moisture
- Polyester liner provides pure comfort
- Free-Flow Zip System allows you to open the bag sequentially for ventilation up to the point where it is opened flat as a quilt
- With the Free-Flow Zip System, you can even secure the snaps around your shoulders, open the footbox zipper and 'wear' the Trek around camp
- Tapered-rectangular fit is designed for spacious comfort when you're camping or traveling
- 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 | 0 degrees (F) - ISO |
| Tested Comfort | 12 degrees (F) - ISO |
| Temperature Rating (F) | 0 degrees (F) |
| Temperature Rating (C) | -18 degrees (C) |
| Shell | 100% RCS recycled polyester |
| Zipper Location | Left/Right |
| Insulation Type | Down |
| Water-Resistant Down | Yes |
| Fill | 650+ fill-power duck down |
| Sleeping Capacity | 1-person |
| Lining | 100% RCS recycled polyester |
| Sleeping Bag Shape | Semirectangular |
| Stuff Sack Volume | 26 liters |
| Gender | Unisex |
| Sustainability | Down certified to the Responsible Down Standard (RDS) Contains recycled materials |
Buying Advice
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Customer Images
marcelitas
Feels great!
1 year ago
[This review was collected as part of a promotion.] My kids decided to have a sleepover inside the bag I. Their own room, they thought it was warm and cozy but again we used inside the home, we haven’t had a chance to use outside but the temperature limit on it is great. You can unzip in multiple places and comes with its own bag.
Originally posted on influenster.com
cd_loves_makeup
Lightweight sleeping bag
1 year ago
[This review was collected as part of a promotion.] I love this sleeping bag! It’s so soft and comfortable. The comfort level is rated at lower limit of 15°F. Hopefully, I won’t be anywhere that cold. It’s also small and compact so it’s easy to store and travel with.
Originally posted on influenster.com
heatherc1418
Good quality sleeping bag
1 year ago
[This review was collected as part of a promotion.] I can't wait to use this camping! This is a very nice quality down sleeping bag. It's comfortable and roomy and is rated to keep you warm down to 15 degrees! The down didn't poke through the fabric and the zippers worked nicely. My only issue is that one of zippers seems to need fixed as noted in one of the pictures. I like that it came with both a storage cube so the down doesn't get deflated in storage but it also has a travel bag for your trips!
Originally posted on influenster.com
joeld10
Top of the line quality material and sleeping bag!
1 year ago
[This review was collected as part of a promotion.] Top of the line brand and sleeping bag! This will definitely keep you warm in the winter and I can't wait to take this camping! Cold spring and summer nights and I'll be warm as a bonfire in this bad boy! The material is durable and the free flow zip system works amazing!
Originally posted on influenster.com
jainat
Super comfy!
1 year ago
[This review was collected as part of a promotion.] Super comfortable sleeping bag with a really good design to keep the zipper from breaking. Warm and more comfortable than most. Beautiful color and had multiple bag sizes to choose from.
Originally posted on influenster.com
Sioban D.
LOVING this Sleeping Bag; Bought Used in Excellent Condition
6 months ago
[This review was collected as part of a promotion.] I bought this for future, unknown trips. My nephew immediately took it out of the box and got into it. He looked so comfy I decided to try it in my bed and now I just love it and sleep with it. It OPENS on the bottom to stick your feet out. This is why I bought it. I can't stand sleeping without sticking my feet out to breathe lol. So, it hasn't even made it outdoors yet but the quality and comfort is excellent. I bought it used on the site and it was in excellent condition as described. Has a very nice packing bag as well with straps. This is why outdoor equipment is worth paying a premium; you really get what you pay for and I highly recommend the brand.
Originally posted on Sea to Summit
christiang89
Top of the line product that wont disappoint
1 year ago
[This review was collected as part of a promotion.] The package quality is next to none- the quality of the sleeping bag feels like a sleeping mat built into the sleeping bag. Also comes with a user manual and a sleeping pouch container to hold the sleeping bag. Using it for last 1 month 3 things that stood out 1. Feels like I'm sleeping on a could, sleeping bag comes with a comfort padding and not just a bag with cheap/useless materials. 2. Quality control is superb, company makes sure products are correct and very attention to detail. 3. Overall the retention of heat is appearant and the product holds to its standard
Originally posted on influenster.com
Anonymous
Durable and Packable!
1 year ago
[This review was collected as part of a promotion.] The sea to summit trek down sleeping bag is amazing! The colors are beautiful but more importantly it is extremely comfortable and durable! I love how packable it is and the convenience of the carrying case it comes with!
Originally posted on influenster.com
ebilger
Great lightweight sleeping bag!
1 year ago
[This review was collected as part of a promotion.] The Sea to Summit Trek Down Sleeping Bag is really nice! It’s super lightweight but keeps you warm! The zippers are a little odd with them over lapping. It comes with a nice bag to put it in to store away!
Originally posted on influenster.com
michaela2424
Awesome sleeping bag
1 year ago
[This review was collected as part of a promotion.] I love this sleeping bag! I typically go camping more casually, as in not backpacking for multiple days, etc., so keep that in mind when considering my opinion. The sleeping bag is lightweight yet warm. I’m glad it unzips on either side and includes various snaps and loops for increased functionality. I am an average height female of slim stature but I chose to purchase this version instead of the women’s version. I haven’t compared sizes or other specs, but figured the unisex version was a safer and more flexible bet. I picked the 30 degree sleeping bag again for flexibility. I’ll be able to layer within the sleeping bag if I happen to camp in colder weather. I love the vented storage bag (as pictured). Not all sleeping bag storage bags are vented and that’s a big positive for me.
Originally posted on influenster.com
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