Celsius Mammoth Double 0°F Sleeping Bag
Our newly redesigned Celsius Sleeping Bag leaves ordinary rectangular bags in the rearview with a modern angled baffle pattern and a handful of anything-but-basic hues to match your personal style.
But the Celsius is not just a pretty face—the double-layer construction and innovative fiber fill chase away the chill so you stay snug as a bug long after the sun goes down. We even added a cinchable mummy-style hood for extra warmth (bonus: it also keeps your camp pillow free of crud).
Finally, we streamlined the sizes on our new Celsius Sleeping Bag line to make sure everyone sleeps happy. The Celsius Mammoth double two-person sleeping bag is the same as our previous Mammoth size (94" x 62") and features a durable polyester taffeta shell that's tough and easy to clean.
Camp on the bright side with Celsius.
- Rectangular sleeping bag with mummy hood
- Extreme rating for temperatures as low as 0° F / -18° C
- Full-length shoulder and zipper draft tubes
- Innovative fiber fill for maximum warmth
- Anti-snag zipper and webbing
- Angled baffle pattern with stylish color block design
- Double I-zip zipper design makes an easy entry from either side of the bag
- Interior phone pocket
- Hang loops for easy storage
- Includes durable stuff sack
- TETON Sports Lifetime Warranty
More details about the Celsius Mammoth Double 0°F Sleeping Bag:
| Best Use: | Camping |
| Sizing Note: | TETON's extra cozy sleeping bags are often bulkier than customers expect. This sleeping bag is considered oversized, and is great for camping by your car or RV, but won't work for backpacking. |
| Material Overview: | 70D Polyester Taffeta, 75D Polyester Flannel, and SuperLoft Elite Single Channel Hollow Fiber |
| Zipper Type: | Double I-zip makes it easy to enter and close from either side of the bag |
| Shell Material: | 70D Polyester Taffeta |
| Liner Material: | 75D Polyester Flannel |
| Fill Material: | SuperLoft Elite Single Channel Hollow Fiber |
| Dimensions (in use): | 94" x 62" |
| Dimensions (stored or packed): | 30" x 16" x 16" |
| Pack Weight: | 15.1 lbs. |
| Storage Method: | Stuff Sack |
| Temperature Rating: | 0F / -18C |
| A Note About Temperature Ratings: | Most of our sleeping bags list an extreme rating. Because of this, it’s important to consider your sleeping preferences when selecting a bag. If you like things toasty, we recommend adding 20° to 30° degrees to the listed temperature rating when selecting a bag. For help selecting the perfect bag, contact us. |
| Country of Origin: | China |
| Care Instructions: | Learn how to care for a TETON sleeping bag. |
| For California Residents: | Prop 65 Warning |
Please note: We do not ship to P.O. boxes. Please provide a physical shipping address when checking out.
We ship from our warehouse in Salt Lake City, Utah via various methods, including USPS and FedEx. If an item is available for sale, it is in stock in our warehouse and will ship as soon as the payment processes, usually within 1 business day of your order.
Once shipped, orders typically take approximately 3 to 5 business days to arrive.
Standard shipping is free for orders $75 and above—after discounts are applied and before taxes and shipping are calculated—to destinations in the continental 48 US states.
When you place an order, you will get a confirmation email. Once your order has left our warehouse, we will email your tracking information to you. Your carrier can give you an estimated arrival date. Most carriers provide step-by-step updates if you request them.
Express shipping is available via FedEx. Rates are calculated by package weight and destination. These options and their rates will be available during checkout.
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Built TETON Tough
Our Lifetime Warranty
All of our products are backed by a limited lifetime guarantee. Our products are built to withstand whatever nature throws at you, but rest assured, our warranty will help get your gear repaired or replaced if anything goes wrong.
Product Reviews
- BBenjaminRated 5 out of 5 starsAug 10, 2023Perfect for couples!
Camping as a couple is usually a bit of a challenge, but sleeping in this bad boy made a huge difference in our quality of sleep! It’s basically queen sized so we had pleeennttyyyy of room to snuggle up. It also wicked away most of the sweat but I’d recomend outing a second sheet between the bag and sleeping bad since a lot of condensation built up underneath. Otherwise we loooved it and would recommend it to anyone needing a bit more space on their next camping trip!
- RFRacheal Feuerbach B.Verified ReviewerRated 5 out of 5 starsAug 9, 2023MAMMOTH IS A MUST!
As someone who has been camping from a young age, I have owned many sleeping bags and can honestly say TETON Sports makes the BEST sleeping bags! This oversized two-person sleeping bag easily fits my 5'8" frame along with my partner and our dog. The plush poly flannel interior invites you to snuggle up for a cozy night of sleep and the cinchable mummy-style hood keeps me warm on those chilly nights. Plus the velcro closures makes sure cold air doesn't sneak inside. I also love the inside pocket that holds my phone or flashlight and the durable exterior holds up nicely to our dog running and jumping on it. It's a perfect addition for anyone who enjoys tent or car camping. Highly recommend this to be an addition for any outdoor enthusiasts!!
- JYJonathan Y.Verified ReviewerRated 5 out of 5 starsAug 7, 2023Perfect Family Bag
This is the perfect family bag. We just wrapped up an unforgettable car camping trip, and I couldn't have asked for a better companion than the Teton Sports CELSIUS MAMMOTH 0°F Sleeping Bag! From the moment we crawled inside, I knew we were in for a cozy night's sleep. The 0°F rating was spot on, as we stayed warm and toasty even when the temperature dropped during the night. The spacious design allowed us to sprawl comfortably, and the soft lining felt like sleeping on a cloud. It's the perfect balance of roominess and insulation for camping adventures! Not to mention, the durable materials and quality construction reassured me that this sleeping bag is built to last. Whether it's a weekend getaway or an extended road trip, the Teton Sports CELSIUS MAMMOTH is a must-have for all campers seeking ultimate comfort and warmth. We embraced the joy of car camping with this fantastic sleeping bag - highly recommended!
- FFTDVerified ReviewerRated 5 out of 5 starsJul 28, 2023Home comfort in the outdoors
Ok first of all this thing really is mammoth! Usually 2 person bags are really 1.25 person bags, but this is truly a 2 person bag. Secondly it is very warm, very soft, and very comfortable, just like wooly mammoths probably were. I've been camping for 10+ years and this bag really hits home for car camping. Highly recommend!
- EWElisa W.Verified ReviewerRated 5 out of 5 starsJul 25, 2023Perfect for families
I got this sleeping bag because I am always worried about my kid’s temperature when we camp and this sleeping bag eases my mind because we are all in one bag and it has a very warm rating.
Other than that this sleeping bag is super luxurious inside. It is so comfortable and squishy. I put it on top of an air mattress this past weekend in RMNP and it felt like sleeping on my bed at home.
- DDaveVerified ReviewerRated 5 out of 5 starsAug 10, 2023Freaking Huge
This bag is so rad! It's thick, super warm, and it's massive. I will say that it's almost too big in that the stuff sack could be a little larger. When it arrives it is a two person job to get it out of the bag, but re-stuffing it is easier than you think.
I can't wait to get this out on more adventures, but after using it for a night I'm hooked. It fit perfectly in the back platform I've built in my car and my wife and I were super comfortable sharing it. It has a great inside pocket for storing your keys and phone and the zippers slide like butter.
If you are trying to save on weight, or pack light this definitely isn't for you, but if you have room to spare in the car and want to camp with the feel of luxury accommodations (as far as camping goes) this is THE bag.
- EBEric B.Verified BuyerRated 3 out of 5 starsJul 31, 2023Good and bad.
First the good. The materials are of good quality, especially the liner. The liner is very soft and warm to the touch. I haven't had the bag in extreme weather yet, but it is very warm and I suspect it will perform well in conditions near its rating. The baffles appear well designed and adequate to prevent drafts.
Now the bad. The stuff sack is ridiculously small. When the bag arrived, it was so tight in the sack that I was afraid I would rip the bag or the stuff sack attempting to extract it. Replacing it in the stuff sack after camping is equally a nightmare, and I'm neither small nor inexperienced at the task. Although the materials are of good quality, the zippers are wrong for the bag. A well designed bag/zipper combination is almost impossible to jam even if using one hand, but these are almost impossible to zip using two hands. I can always get a bigger sack (or canvas tent bag?) to carry it in, but the zippers prevent me from recommending this bag.
TETON SportsJul 31, 2023Hi Eric. We're sorry to hear that the zippers aren't functioning well and the storage bag for it is too small. Please contact our customer service by emailing info@tetonsports.com and we'd be happy to send you a larger stuff sack for this sleeping bag to relieve one of those issues. If it seems like a potential zipper defect, please send photos as well to get a warranty claim rolling.
- MHMaia H.Verified ReviewerRated 5 out of 5 starsJul 30, 2023My dog loves it
Absolutely love this sleeping bag! It’s super cozy and has plenty of room for two (and the dogs). While it is a little heavy/bulky, if you can spare the room in the car, it’s 100% worth it and you’ll be the comfiest ones at camp.
- PPPaul P.Verified ReviewerRated 5 out of 5 starsJul 30, 2023Just WOW!
This sleeping bag blew my wife and I away! Hands down the most comfortable sleeping bag we've ever used, by a mile! Fluffy, draft control, large extended mummy style head, pocket for storage... We are bringing this bag on all our adventures. This bag is so comfy it makes you wanna fall asleep. Teton Sports nailed this! Stoked to have this!!!
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