Experience ultimate comfort with the Montauk? 40 F Big and Tall Mummy Sleeping Bag. Designed for warmth, it features lightweight Coletherm? hollow polyester insulation and a Thermolock? draft tube with zipper to prevent heat loss. The mummy bag shape, complemented by a drawstring adjustable hood, ensures maximum heat retention. Enjoy versatility with a two-way zipper for ventilation on mild nights. Plus, this machine washable sleeping bag makes post-adventure cleanup a breeze.. Embrace coziness and functionality with Montauk?.