Designed in Japan. the Ofuton Sleeping Bag Wide LX is made of washable down inner that retains warmth in temperatures as low as 37F. while the Deobrain processing ensures antibacterial properties. Use the Ofuton Sleeping Bag Wide LX for year-round camping. The bag features a modular dual zipper to serve as both a sleeping bag and a futon. Pair with the Inflatable Mattress 2.5 for an added layer of comfort or explore the Ofuton Sleeping Bag. Wide for warmer weather needs.