Coleman Big Bay 0/20/40°F Mummy Sleeping Bag for Adults | Hooded Cold-Weather, Foot Vent, Storage Sack

Overview

The Coleman Big Bay sleeping bag is built for cold-weather adventures, from car camping to backyard stargazing. Offered in standard and Big & Tall fits, this adult mummy bag blends a semi-sculpted hood with heat-trapping design to help you stay comfortable when the night grows chilly. The versatile construction supports a snug, enveloping sleep experience without adding bulk to your pack.

Warmth you can feel

Powered by Coletherm MAX insulation, the bag is designed to help retain heat in cooler conditions while you settle in around a campfire or beneath a clear sky. The semi-sculpted hood helps keep warmth close to the head, and a Thermolock draft tube minimizes heat escape along the zipper, so you can rest with less draft intrusion when temperatures dip.

• COLETHERM MAX insulation for strong heat retention in cool nights
• Semi-sculpted hood that helps seal warmth around the head
• Thermolock draft tube reduces heat loss along the zipper

Comfort and practical features

Every detail serves comfort and ease of use. A J-zipper foot vent provides adjustable airflow on milder evenings, helping you tailor your sleeping environment. The ZipPlow design makes zipping in and out snag-free, so you can settle in quickly even in low light.

• J-zipper foot vent for controlled airflow
• ZipPlow zipper prevents snags for smooth operation
• Compressible stuff sack aids quick packing and storage

Packability and versatility

When it’s time to move, the sleeping bag compresses into a compact stuff sack for easy transport. The Big Bay is designed to balance warmth with practical packing efficiency, letting you maximize trunk or backpack space on weekend adventures.

Size options

Available in standard and Big & Tall versions, the Big Bay accommodates different body types while maintaining a mummy silhouette that helps minimize draft exposure and maximize heat retention.