TETON Sports Fahrenheit Mammoth -18 °C Double Sleeping Bag — Oversized 94x62 in, Cotton-Flannel Liner & Mummy Hood

Built bigger than a standard queen mattress at 94 x 62 inches, the Fahrenheit Mammoth combines a soft cotton-flannel liner, full-length draft tubes, and mummy-style shaping to trap heat while giving partners plenty of space. Thoughtful touches like unzipping on each side and at the foot, hanging loops, and a durable stuff sack make it practical for repeated outdoor use. The bag’s fiber insulation and design focus on retaining loft and warmth without complicated setup—ideal when you want fast, comfortable rest after a long day outdoors.

How warm is the Mammoth and when should I use it?

This double bag is designed for cold-weather car camping and base-camp scenarios where 0°F performance is appropriate. It is not a specialized mountaineering bag, but it performs well for camping, hunting, and family trips where a robust, insulated two-person bag is preferred.

• Temperature rating: 0°F suitable for cold-season car camping.
• Insulation: innovative fiber fill that maintains loft for heat retention.
• Best use: car camping, hunting base camps, cabin trips, and family overnights.

Will two adults fit comfortably and still retain warmth?

Yes—this bag is larger than a queen mattress so two sleepers can spread out. The design balances space and heat retention with shoulder and zipper draft tubes and a mummy-style hood to reduce heat loss while allowing shared comfort.

• Dimensions: 94 x 62 inches, roomier than standard double bags.
• Draft control: shoulder and zipper draft tubes minimize cold spots.
• Access: full-length zips on both sides plus foot zipper for ventilation or entry.

How do I pack and care for the Fahrenheit Mammoth?

Packing is simple thanks to the supplied heavy-duty stuff sack; stuffing from the bottom preserves the fill loft. For storage, use the hanging loops and keep it uncompressed to extend insulation life. Routine cleaning should follow label instructions to avoid damaging the fill.

• Stuff sack provided for compact transport and easy compression.
• Storage tip: hang when not in use to protect loft and prolong life.
• Care: follow manufacturer washing/drying instructions to maintain performance.

What features improve comfort on multi-night outings?

The Fahrenheit Mammoth includes a soft cotton-flannel interior and a mummy-style hood for cozy head warmth while still allowing movement. Useful extras like dual-side zippers, a bottom zipper for foot access, and loops for hanging add convenience without sacrificing comfort.

• Lining: soft cotton flannel for a comfortable sleep surface.
• Hood and fit: mummy-style hood helps trap warm air around the head.
• Convenience: dual zippers and hanging loops for easy use and storage.

Who is this for? The TETON Sports Fahrenheit Mammoth is aimed at couples, families, and outdoor enthusiasts who prefer a single shared sleep system for car camping, hunting camps, or longer base-camp stays. Choose this bag if you want generous sleeping space, straightforward packing with a supplied stuff sack, and design details that prioritize warmth and easy use over extreme alpine performance.