Sea to Summit Alpine Down -20F/-29C Sleeping Bag Blazing Yellow Regular. The expedition mummy fit provides ample space for winter gear while the modified Free-Flow Zip system provides ventilation and versatility. Complex construction throughout and 850+ fillpower RDS-certified non-PFAS Ultra-Dry Goose Down delivers maximum warmth retention. Specifications for Sea to Summit Alpine Down -20F/-29C Sleeping Bag: Manufacturer: Sea to Summit Color: Blazing Yellow Temperature Rating: -20 Fahrenheit Bag Shape: Mummy Zipper Type: Zip Insulation: Goose Down Gender: Unisex Weight: 3 lb Age Group: Adults Fabric/Material: 20D Nylon Features of Sea to Summit Alpine Down -20F/-29C Sleeping Bag: RDS-certified 850+ fillpower goose down with a non-PFAS Ultra-Dry Down treatment for maximum thermal performance Recycled 20D nylon shell material with a non-PFAS DWR is light and durable. Hood and footbox have a highly water resistant breathable fabric for extra moisture protection - ideal for bivvies or snow caves Roomy expedition mummy fit provides plenty of space for you performance clothing and gear you don't want to freeze Highly breathable liner for enhanced comfort Free-Flow Zip System: Full-length zipper with half-length zipper on opposite side for excellent temperature regulation Technical hood and footbox efficient mummy shape and generous draft tubes on the zippers maximize warmth retention Sea to Summit Guarantee is offered for the Lifetime of this product Package Contents: Sea to Summit Alpine Down -20F/-29C Sleeping Bag Sea to Summit S2042: Alpine Down -20F/-29C Sleeping Bag Blazing Yellow Regular