Stay warm, even when the temperature dips to 40-degrees, in your Coleman Alpine 40°F Thermotech Warm Weather Sleeping Bag, Black with polyester cover and cozy polyester tricot lining. The specially designed, patented zipper system plows fabric away from the zipper to avoid snags and the Fiberlock Construction prevents insulation from shifting, extending the life of your sleeping bag. When you're ready to pack up, our patented Roll Control System keeps the bag in place for easier rolling and the Quick Cord no-tie patented packing system makes storage a cinch. It fits heights up to 5'11" and is machine washable.