Multifunctional design 3 in 1 bike bag that can be used as a pack bag on the rear rack, a shelf bag for easy access, or a rain cover to protect contents in wet conditions. This flexible setup reduces the need for multiple bags and adapts to varying outdoor cycling needs. Large capacity 60L rear bag offers ample storage for essential cycling gear and accessories during rides. The size supports carrying gear for extended trips and everyday excursions. Rain protection Includes a protective rain cover to shield belongings from moisture, helping keep items dry during rain or damp conditions. Mountain bike compatibility Specifically designed for mountain bikes with secure fixation to the rack or frame, delivering stable and reliable storage even on rugged terrain. Use scenarios Allday ride or bikepacking: Use the 60L capacity to carry clothing, tools, spare tubes, and food. Switch to the shelf bag for quick access to frequently used items, and deploy the rain cover when rain is forecast. Mountain trail rides: Attach securely to the rack or frame for stable storage while navigating uneven terrain; use the rain cover if weather turns wet to protect gear. Daily commuting or allweather trips: Keep essential items organized and within reach as a pack bag, then convert to a shelf bag for easy access during stops; rain cover provides added protection when parked or riding in drizzle.