The Urban Top Tube Flow Bag is Lightweight and robust! This bag is the perfect SKS bike bag for commuters and city cruisers. It can be mounted on the top tube of the bike with screws or hook and loop fasteners. It's large enough to store a phone, but not too big to be a distraction. The paint-friendly hook and loop fasteners with tube protection can be individually shortened and replaced. The water-repellent and durable material protects the contents from rain and dirt. The non-slip and reinforced underside provides additional stability on bumpy roads. The protected cable grommet is particularly practical, for example, for charging a smartphone. The Easyzip function with a double-sided zip also allows quick access to money, snacks, or a mobile phone.