The Thunder Bay backpack from M-Wave is a great way to carry what you need on your ride. Its construction makes it waterproof and dustproof to protect your wallet, phone, spare clothes, or whatever you desire to carry. The shape and the adjustable and padded straps make for an extremely comfortable fit. It also features a detachable inner bag. The reflective logo will help with your visibility. One hundred percent waterproof! Extremely tough material and heat-sealed joints make it dustproof a Adjustable waist, chest, and padded shoulder straps, along with the anatomically shaped back, make f The roll cover makes size adjustment possible; the reinforced bottom makes it even tougher Also includes a detachable inner bag and a mobile phone bag The attached handle makes it easy for you to carry when it is not being worn