Compatible with all types of racks, including E-Bikes. Anchorage to the universal rack with straps. To prevent the saddlebags from coming into contact with the spokes, buy accessory ref. 291220. Made of waterproof Polyester. Velcro closures with engraved Basil logo. Possibility of closing them by rolling them in addition to the Velcro. Fiberglass reinforcements inside to maintain the shape of the sides and floor of the saddlebags. Reflective details on the 3 sides to improve night visibility.