With intensified fabric and durable anti-slip leather, this top tube bag road bike can bring you the best application experience while outdoor riding. Simple but fashionable, this bike double top tube bag provides enough rooms and is a wonderful choice for riding in any environment. The roswheel mountain bike saddle bag features a streamlined design for an aero-shape that fits plush under most saddles with rails, keeping it out of the wind. The reliable Velcro strap allows tool free installation and holds the bag firmly to your saddle and seatpost, while the outside is constructed of waterproof fabrics and laminated with water resistant coating to keep your essentials dry and in working order. Scotchlite reflective safety accents are strategically placed to aid in keeping you visible in low-light conditions. To further improve visibility the integrated taillight hanger gives you the option to hang a rear taillight for evening commuting. A built-in key holder designates a safe place to keep your house or car keys while riding, because after a long, hard ride, being locked out is the last thing you want to deal with.