MOSISO Bike Rack Bag — 11L Waterproof Rear Trunk Bag with Reflective Dazzle Tail, Black

MOSISO Bike Rack Bag with Dazzle Tail is a waterproof 11L rear trunk bag that secures to most racks, increases night visibility, and carries everyday cycling essentials.

This compact rear rack trunk is crafted to hold your phone, charger, wallet and small accessories while keeping them protected from splashes and dust. Built from durable polyester with a reflective dazzle panel and reliable fasteners, the bag balances storage capacity and low-profile styling for commuting, touring or weekend rides.

How much can this rack bag carry on a daily ride?

The trunk offers an 11-liter main compartment with interior organization for small items so you can keep essentials sorted and accessible. Its dimensions make it roomy enough for common carry-ons without hanging off the rack.

• External size: 15.75 x 7.09 x 6.3 inches (L x W x H)
• Main compartment capacity: 11 liters
• Includes one internal mesh pocket for cables, keys or coins
• Top elastic band for quick-stash items like a lightweight jacket or towel

Will this bag stay secure on rough roads?

The MOSISO trunk attaches with three hook-and-loop straps designed to grip a variety of rear racks and resist shifting on bumpy terrain. Combined with its compact form, the bag stays stable so contents remain organized while you ride.

• Three adjustable hook-and-loop fasteners for a snug fit
• Low-profile shape reduces pendulum motion on uneven surfaces
• Sturdy woven handle for quick pickup off the rack

How does it protect items from weather and nighttime hazards?

Constructed from water-resistant polyester, the bag helps repel rain, mud and dust, keeping gear drier than an unprotected trunk. A reflective dazzle tail at the rear increases visibility to motorists for safer evening or low-light rides.

• Waterproof polyester exterior sheds light rain and splashes
• Reflective dazzle tail improves visibility after dark
• Seams and closure designed to limit water entry during typical commutes

Is it comfortable to carry when off the bike?

Yes — MOSISO included both a reinforced carry handle and an adjustable shoulder strap so you can move effortlessly from bike to destination. The shoulder strap adjusts from 29.1 to 50.8 inches to suit different body sizes and carrying preferences.

• Adjustable shoulder strap: 29.1" to 50.8" for crossbody or shoulder use
• Durable carry handle for grab-and-go convenience
• Lightweight construction keeps off-bike weight low

Who is this for? If you commute by bike, run errands, or take day trips and want a tidy, weather-resistant place for essentials, the MOSISO Bike Rack Bag with Dazzle Tail is designed for you. It fits most rear racks, gives you internal organization without bulk, and adds a safety-reflective accent for low-light travel. Ideal for urban riders, multi-stop commuters, and weekend cyclists who prefer a compact trunk that doubles as an easy-to-carry satchel.