Mammoth 20F

The Mammoth 20°F Sleeping Bag combines roomy comfort with dependable warmth for your next outdoor adventure. Measuring 94 x 62 inches, it’s generously sized for two campers or anyone who enjoys extra space to stretch out. This bag features a durable double-layer construction, high-performance insulation, and draft tubes to trap heat and ensure cozy nights down to 20°F/-7°C. The Mammoth sleeping bag also features an integrated hood and full-length zippers with draft tubes so you can sleep your way. From weekends under the stars to summer camping, the Mammoth 20°F is perfect for your next adventure.

*The ratings we use are Survival Temperature Ratings, this is the coldest temperature the sleeping bag is designed to keep you alive in, but it doesn’t guarantee comfort. At the lowest point, you might be shivering or experience discomfort. For comfort ratings, we suggest adding 20-30 degrees from the listed rating.

Weight: 14 lbs

Material: Polyester Taffeta, Polyester Flannel, and SuperLoft Elite Single Channel Hollow Fiber

Shell Material: Polyester Taffeta

Dimensions: 94" x 62"

Stored Dimensions:

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.