This is a Mystery Ranch backpack, the RADIX 31 model. I bought it for tent camping, but I haven't had a chance to use it, so I'm selling it. Retail price: 33,000 yen Color: White/Hunter Size: S/M Lighter, faster, and stronger! The RADIX 31 is designed for everything from day hikes to minimalist overnight trips, knowing that reducing weight makes mountain missions better. Durable and lightweight Ultra PE Birds Eye and recycled Robic ripstop fabric are used. Without sacrificing toughness, it reduces the burden of multi-day climbs and long thru-hikes, while offering ample storage and enabling agile movement. The waist belt, compression straps, and even the frame are removable, giving you the option of choosing the best balance of comfort and lightness, or pursuing ultimate lightness.