Used once this summer for climbing Mt. Fuji. It's a backpack, and it feels like it holds more than 30 liters. The color looks quite yellow in the photos, but it's closer to a khaki color, like olive drab. I'm 168cm tall, and the M size was perfect. From the official website: Material: CORDURA® OX 210D Nylon 100% / Water resistance 1,500 Weight: 1500g Size: W29_H65_D16cm Back Length: M=48cm Capacity: 30+5L #MILLET #Millet #SaasFee #Backpack #MountaineeringBag #Mountaineering #HikingBackpack #MtFujiClimb #MtFuji Size: 30-45L Popular Model: Saas Fee