Rugged, dependable, and down-right comfortable. These 3 elements defying the Big Timber -20 Degree sleeping bag. With a tough 8 ounce twill polyester shell, a soft touch cotton flannel liner that is quilted, and loose shell construction for maximum warmth and durability, this oversized sleeping bag guarantees rest for a full next day of adventure. The zip together feature allows two same size rectangular bags to be zipped together to make a double wide sleeping bag. Packed size: 13" x 36". Three compression straps for easy storing.