For bicycle shelf tail bag — 8L rear-rack bag designed for daily riding Key benefits Large 8L capacity: Holds your daily essentials in one place so you can ride without back strain or loose items dangling from your frame. Weather-resistant protection: Made from waterproof fabric that reduces rainwater penetration, keeping phones, wallets, and clothes drier in unexpected showers. Flexible carrying options: A removable shoulder strap tucks neatly away when not needed, converting the bag from rear-rack luggage to a shoulder or crossbody bag in seconds. Fast, no-hassle access: The wide top opening lets you reach items quickly while stopped, speeding up roadside repairs, snack breaks, or transitions at a commute end. What makes it practical Purpose-built for bicycle rear racks: Compact but roomy, the 8L size balances storage capacity with stable mounting on most rear shelf setups. Durable, everyday materials: Waterproof fabric offers reliable performance in wet conditions without adding heavy bulk. Simple, adaptable design: Removable strap and easy-access opening mean the bag adapts to different trips and carrying preferences. Typical uses Daily commute: Store a change of clothes, lunch, umbrella and personal items, then detach the shoulder strap to carry the bag into the office. Weekend ride or errands: Keep tools, snacks, a light jacket and your phone organized and protected while you ride; grab the bag and go for quick stops. Short day trip or sightseeing: Carry essentials securely on the rear rack and switch to crossbody mode for walking or public-transport sections. Specifications and functions Capacity: 8 liters Material: Waterproof fabric (reduces rainwater penetration) Carry options: Rear-rack placement with removable shoulder strap that tucks away Access: Large top opening for quick retrieval of items This For bicycle shelf tail bag offers a practical balance of capacity, weather protection and carrying flexibility for everyday cyclists who need a reliable, easy-to-use storage solution.