Material and size - Made from high quality waterproof nylon fabric that is durable and tear resistant. It resists deformation and helps keep the interior dry. - Size: 18 x 15 x 10 cm Large capacity and organized storage - Generous capacity with a built in mesh pocket and layered storage for easy organization. - Double layer zipper design provides convenient access from any opening. - Fits items such as water bottles, wallets, glasses, keys, and more for quick access on the go. Phone view window and stability - Features a highly sensitive waterproof TPU film window with a phone holder. - Keeps your phone stable, allows you to see and operate the screen clearly without removing the device. Easy to install and compatible - Three point design with 3 Velcro fasteners for secure attachment to the handlebars. - Stable during rides and suitable for most bikes. Designed to resist loosening or falling off. - Can also be used as a travel shoulder bag when off the bike. Practical use scenarios - Daily commuting: keep your phone, keys, wallet, and sunglasses within easy reach while riding, with full phone access at a glance. - Weekend rides or errands: carry water, small tools, and personal items in one compact bag without bulk. - Rainy or variable weather rides: protect valuables inside while still navigating with the phone visible and usable through the window. - General travel: detach and use as a shoulder bag when stopping for breaks or sightseeing. Overall - A durable, weather resistant bicycle bag that combines accessible storage, a practical phone viewing window, and simple, secure installation. Compatible with most bikes and designed to withstand daily use.