Thermodown 0 Sleeping Bag

Regular price $ 179.99

Starting at $59/mo with Shop Pay Installments.

Cold weather is no match for our 4-season Thermodown 0 down backpacking sleeping bag! Each bag lofts to almost 6 inches to keep you toasty warm during those freezing nights in the backcountry.

Only 53 items in stock!
Free Shipping on US Orders | Lifetime Warranty | 60-Day Returns and Exchanges

Product Description

Stay warm and comfortable, no matter the season, in our outstanding Thermodown 0 down sleeping bag. With excellent materials and performance, your search for a great four-season sleeping bag ends here! 

Superior Insulation

Cold weather is no match for the 32 oz. of 700-fill power down insulation stuffed into every corner of this bag. You will stay toasty warm down to 0F (-17C). However, the added warmth does not compromise on size and weight. The bag packs down to just 11 x 8 inches and comes in at only 3 lb.


We've done our best to make this a great bag.

  • On warm nights, easily shed heat with the large two-way YKK zipper which opens from top and bottom. 
  • To prevent annoying snags, we've incorporated a wide zipper guard. 
  • To keep the heat in, a large draft collar automatically wraps around your neck. No need to deal with cumbersome drawstrings or scratchy velcro. The fully insulated and contoured hood can also be completely cinched down. 
  • A roomy trapezoidal foot box with extra insulation will keep your toes nice and warm. 


The bag comes with a durable compression sack allowing you to easily fit the bag into your pack. Between adventures, use the included mesh storage bag or hanging loops to properly store the bag.

For complete waterproof protection, consider our 12L version of our ultralight waterproof stuff sacks (sold separately).

Specs and Sizing

Short Size

  • Size: 76 inches by 31 inches, comfortably fits adults up to 5'6"
  • Weight: 2 pounds 14 ounces
  • Fill Weight: 30 ounces

Regular Size

  • Size: 80 inches by 31 inches, comfortably fits adults up to 6'0"
  • Weight: 3 pounds
  • Fill Weight: 32 ounces

Long Size

  • Size: 86 inches by 33 inches, comfortably fits adults up to 6'6"
  • Weight: 3 pounds 2 ounces
  • Fill Weight: 33 ounces

Other Specifications

  • Packed Size: 11 inches long by 8 inches in diameter
  • Insulation: 700 fill-power 90/10 white duck down
  • Shell Material: lightweight and durable 20D ripstop nylon
  • Interior Lining: breathable 320T polyester pongee

How do I care for my new down sleeping bag?

  1. When you first receive the bag, run it in the dryer at the low-temperature or air fluff setting for about 10 minutes to loosen up the down that has been compressed during the shipping process.
  2. When heading out on the trail, use the included compression sack to protect the bag and also reduce the amount of space it takes up in your pack. Use care when stuffing the bag into the compression sack.
  3. Between trips, always store your bag using the included mesh storage sack or the hanging loops.
  4. Always wash your bag by hand or a front-load tumble washer. Never use a top load washer. Never use bleach.

For more detailed care instructions, including how to make repairs, please review our complete guide.

How do you determine the temperature rating?

We've put together an in-depth article on how we determine our temperature ratings. The guide also provides lots of helpful advice regarding making an informed decision.

How can I increase the temperature rating of my sleeping bag?

If you'd like to use our down bag at temperatures of 0 degrees and below, you may consider adding a sleeping bag liner to add about 10 degrees to the warmth rating. The Sea to Summit Thermolite Sleeping Bag Liner is a great option.

We offer two shipping services within the United States:

  • Free Standard Shipping = 5-7 Day Ground Shipping
  • Expedited Shipping = 2-4 Day Express Shipping

Do you ship outside of the United States?

Yes, we ship to all of Canada, Australia, and New Zealand. We also ship to select European countries that include the following; UK, Germany, Denmark, the Netherlands, Switzerland, France, Sweden, Finland, Poland and Ireland.

All international orders are shipped via DHL Express with all Duties Paid. This means that all import taxes and duties are prepaid. No additional fees will be collected from the customer.

Most international deliveries are made within 4-6 business days, although more remote locations can take a couple of extra days. All international shipments are fully tracked from door-to-door.

If your destination is not listed above, we apologize that we're not able to accommodate direct shipments to you. However, some of our customers have successfully used 3rd party international parcel forwarding services.

What is your return/exchange policy?

We offer 60 days to accommodate any returns or exchanges of non-defective products. In some cases, we can accommodate returns and exchanges past 60 days, but these will be decided on a case-by-case basis. Any returns after 60 days will only be offered store credit.

What items are eligible for a return?

To be eligible for a return and refund, your item must be unused and in the same condition that you received it. It must also be in the original packaging.

If you've purchased a tent or tarp and would like to set it up in your backyard, please do so on a dry, clear day to keep the tent/tarp as clean as possible. Pitch the tent/tarp on dry grass if possible and use other stakes if you have them available. This will keep the tent/tarp and stakes in an unused condition to facilitate a return.

If items sent back for a return/exchange show clear signs of use (excessive dirt, animal hair, etc.), the return/exchange will be rejected and the items will be shipped back.

Are shipping fees refundable?

Shipping costs are non-refundable. If you receive a refund, the initial cost of shipping your order (if any) will be deducted from your refund.

Is return shipping free?

No, the cost of return shipping will be subtracted from the refund amount. We will provide a prepaid return label for the return shipment. The cost of return shipping will be provided to you along with the prepaid return label. 

Please note that due to our shipping volume, we have access to significantly lower shipping rates than retail. As a result, the cost of the return shipping will be much lower, resulting in a higher refund.

How do I initiate a return/exchange?

To initiate a return/exchange, please email us at with the following information:

  • Your original order number
  • The items to be returned/exchanged
  • The reason for the return/exchange

Once your return/exchange request is received, we will provide a prepaid return shipping label along with the cost of return shipping. If you decide to proceed with the return, please use this label to send the items back to us. We will only accept returns that are shipped via the prepaid return label. This ensures that the shipment will be trackable and insured.

Once the returned items are delivered and inspected (please allow 1-2 weekdays for inspection), we will issue your refund or exchange.

When a refund is processed, a credit will automatically be applied to your original method of payment and you will receive an email notification. Please allow 2-5 business days for the credit to appear.

What about international returns?

If you are an international customer, the same 60 day return/exchange policy applies. To initiate an international return, please contact us at the email address above and provide the same order/item to be returned information. We will then coordinate with you on the return process, which will differ slightly depending on your exact location. The return instructions above only apply to US customers.

All of our products come with a limited lifetime warranty against manufacturer defects. If there is a problem with your gear due to manufacturing, we will replace it free of charge, no questions asked. If you have any concerns about your product, please contact us at:

When contacting us for a warranty claim, please include:

  • The specific product, including size or length
  • Your original order number
  • Your current shipping address

We pride ourselves on our courteous and responsive customer service. We'll do our best to make sure all of our customers are happy with their purchase.

Customer Reviews

Based on 68 reviews
Rio Aguilera (Harrisburg, SD, US)
It will work

Slept in this bag down to 0 degrees (and a bit below, truck said -4 one morning) while elk hunting in the Sarvis wilderness area in CO. I will say that it kept me warm enough to sleep but I was not toasty warm when around 0 degrees f. I was sleeping in heavier layers than most too - I was wearing a heavy merino base layer top along with a Stone Glacier Helio top and the Stone Glacier M7 fleece lined pants. My feet would have been very cold if I had not used down booties. Still an amazing bag for the price and did its job. Just would have enjoyed sleeping a little better a few of those nights. For anything 10 degrees and warmer this bag will work amazing for you.

Anonymous (Southfield, MI, US)

So, I love the bag but on my first campout with it one of the compression bag straps riped out of the seams and rendered the bag useless, if it boasts durable it should be durable. I still love this company but better compression sacks

Nathan (Omaha, NE, US)
Thumbs Up

My Son's first backyard camping adventure was a great success! Partially because of the copious amounts of hot dogs and marshmallows, but also thanks to the Paria 0 degree bag, he slept through the night like a champ. It got down to around 20F and he even took his hot water Nalgene out of the bag because he was too toasty.

I know a single night test doesn't say much, but I've used the Paria 15F quilt for 3 years now and been really impressed. The quality and value had me come back for this bag and I'm glad I did, and glad to have a little dude excited for his next adventure.

Thanks Paria, appreciate y'all!

John Morgan (Denver, CO, US)
Great Value

Overall this bag is incredible for the money. Very warm! Slept in the cloud peak wilderness in Wyoming above tree line over the weekend with cold mornings and snow coming down. This bag had me sweating.

Would buy again for the price. The only thing keeping it from being 5 stars is the zipper is on the wrong side to suite my tent and was a real pain. Would give this bag 10 stars if there were zippers on both sides.

Matthew VanDuzee (Hamlin, NY, US)
First time out with my new bag

My new 0 degree bag worked great on an overnight hike in the Adirondack Park in upstate New York in April. The bag was light and I was plenty warm in my hammock with a low temperature of 38 degrees. Glad I purchased the long as a regular would have been to tight around the shoulder. Even with the long I struggled to zip the bag to the top.
Overall, I’m very satisfied.

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