You need a Backpack for climbing mountain. Our rental backpack has ideal features, especially for Mount Fuji trip. The back breathing system keeps your back always dry and comfortable to carry backpacks more than 10 hours walking. Backpack cover is the must to climb Mount Fuji and it has been attached to all our rental backpacks. Chest-belt, Waist-belt, Shoulder-belt are designed to optimum weight balance. Pole-belt also equipped, that helps to attach the poles when you do not need them. Tons of function including lots of pockets allow you to organize your trip. If you have a water bag with tubes, you can use it with the backpack hydration system. 30-35L is the right size for Mt.Fuji trip. Having color preference? comment on our message board when you place your order.