TETON Sports Mammoth 20°F Oversized Double Sleeping Bag, Blue, 94 x 62 in, Plush Poly-Flannel Lining

The TETON Sports Mammoth is an oversized 20°F-rated double sleeping bag designed to deliver a roomy, cozy night outdoors for two people or family members.

Designed to feel like a soft bed under the stars, the Mammoth combines a plush poly-flannel lining with dual-layer construction and draft protection so you stay comfortable on cool nights. Its generous 94 x 62 inch dimensions give more space than a standard queen mattress, and practical features — like dual zippers and an included stuff sack — make it easy to use at base camp, on family car-camping trips, or while hunting.

How warm is the Mammoth and what does the 20°F rating mean?

The Mammoth is rated to 20°F (-6°C), which indicates the bag performs well for cool-weather camping rather than extreme cold. This rating helps you estimate suitability based on seasonal temperatures and personal cold tolerance.

• 20°F comfort guideline for most average adults
• Dual-layer insulation and shoulder draft tubes reduce heat loss
• Pair with an insulated camp pad for improved warmth

How does the bag fit two people and what space can I expect?

The Mammoth is oversized at 94 x 62 inches (239 x 157 cm), offering more sleeping area than a queen mattress. The roomy interior gives adults and children space to spread out, cuddle, or store a small pillow and gear beside you.

• Queen-size footprint for two adults or adult plus child
• Soft poly-flannel lining for added comfort against skin
• Unzips on both sides so partners can enter or ventilate independently

How easy is it to pack, carry, and care for the Mammoth?

The Mammoth ships with a durable stuff sack designed for the oversized bag; you stuff the bag into the sack rather than rolling. TETON Sports provides online how-to videos that demonstrate the stuffing technique so you can compress it efficiently for storage or transport.

• Includes a heavy-duty stuff sack for easy storage
• Bottom-up stuffing method keeps packing quick and tidy
• Machine-washable materials—follow care instructions on the label

What design elements keep drafts out and comfort in?

The Mammoth uses zipper and shoulder draft tubes plus dual-layer construction to limit cold spots and retain warmth around shoulders and torso. The poly-flannel interior adds a soft, insulating surface that improves perceived warmth and sleep quality.

• Zipper and shoulder draft tubes seal seams against cold air
• Dual-layer construction balances loft and weight for comfort
• Poly-flannel lining creates a cozy sleeping surface

Who this is for: The TETON Sports Mammoth 20°F Double Sleeping Bag suits families, couples, and anyone who prefers extra room while camping. It’s a great choice for car camping, base camp at hunts, or backyard sleepovers when you want an easy-to-use, plush sleeping option for two. If you anticipate freezing temperatures frequently, pair the Mammoth with an insulated camp pad and consider a colder-rated bag for extreme conditions. For support, TETON Sports’ customer service and how-to videos help with setup, packing, and care so you can get back outdoors quickly.