The Ultralight 350 Lightweight Sleeping Bag from Vango is a 2 Season sleeping bag that has been designed to provide warmth while maintaining weight efficiency & compactness making it ideal for expeditions & long distance backpacking The Ultralite 350 features Omega shaping with a larger layer for better warmth by reducing excessive air spaces An excellent loft is achieved with the superfine insulation that is highly compressible & extremely durable