Ride and commute with one bag – waterproof, large capacity, and instantly converts to a shoulder bag.（Silver-gray reflective backpack）

Multifunctional Bicycle Rear Bag — The All-Purpose Partner for Riding and Daily Commuting Waterproof and Durable, No Fear of Rain or Wind Made with PU waterproof fabric and pressure adhesive zipper, double protection design. Rain and splashes cannot penetrate. Even on rainy days, items inside remain dry. Perfect for daily commuting and long rides without worrying about gear getting wet. Large Capacity + Reasonable Size, Fits All Your Travel Needs The rear bag and top tube bag are scientifically paired with sufficient capacity and smart layout. Riding tools, spare clothes, snacks, personal items — all can be packed in one bag for an easy start. Velcro Straps, Rock-Solid Stability Comes with two long and one short velcro straps. Just stick and secure — installation takes only 10 seconds, even for beginners. No loosening even on bumpy roads. Maximum stability guaranteed. Organized Storage + Built-in Dividers, Say Goodbye to Clutter Internal mesh pockets and dividers keep keys, phones, tools, and snacks in their own places. Customizable layout allows neat storage of daily essentials and travel items. No more digging around — everything is organized and easy to find. One Bag, Two Uses — Seamless Switch Between Riding and Daily Modes Riding Mode: Securely mounted on the rear rack or top tube, transforms into a professional cycling bag. Carries gear and enhances safety. Daily Mode: With the included shoulder strap, instantly becomes a shoulder bag or handheld bag. Perfect for work, shopping, picking up packages — grab and go with ultimate convenience. From city commuting to outdoor cycling, from carrying gear to daily errands, this bicycle bag delivers core advantages of waterproofing, large capacity, easy installation, and multi-functionality. It’s your all-purpose partner on every journey. Get yours now and unlock the dual convenience of riding and daily life.