- Tear-resistant 190t polyester shell with waterproof coating
- Inner lining made with soft 190t polyester pongee for a comfortable sleep.
- Bottom zipper improves air circulation when hot; elastic strap keeps warmth sealed in when cold.
Whether you're hiking through the mountains or camping by the lake, the Ultralight 4-Season Envelope Sleeping Bag is designed to keep you warm, dry, and comfortable in a wide range of weather conditions. Built with a durable 190T waterproof polyester shell and filled with hollow cotton insulation, this sleeping bag effectively retains heat while blocking out moisture.