Core at a Glance Say hello to the Mini Portable Water Bottle Bike Rear Seat Bag! It can hang a rear taillight, is daily water-, and has a safe reflective design - total peace of mind for cycling! Plus, it's & portable, crisp & structured Precise Parameters for Detail-Oriented Cyclists No Water Bottle Cage? It Solves That! Many folding bikes lack water bottle cages, making it inconvenient to drink water. With this water bottle bag, the problem is solved in a flash! Whether there's no place for a water bottle on your bike or you're worried about where to put it, this bag handles it perfectly Firmly Installed, No Shaking - Ride Freely With a 3-point strong fixation design, it's suitable for dual-rail saddles on the market. Matched with dense webbing, it securely fixes the bag to the seat post - stable and reliable Wear- Fabric, As Good As New For Ages The rear seat bag is made of polyester + polyethylene, which is wear- during rides, greatly extending its service life. Whether it's daily commuting or long-distance cycling, it accompany you for a long, long time~ Product Name: Bicycle Rear Seat Bag Size: 20cmx8.5cmx12cm (Perfect size - doesn't take up space yet holds a lot) Material: Polyester + Polyethylene (Wear- and , no fear of damage even after long rides) Weight: 156g (So light it feels like , no burden during cycling) Color: Classic Black (Versatile, matches any bike, and looks high-end) Capacity: 2L (Fits phone, tools, water bottle - everything you need for a ride) Features: Easy to install, scratch-, daily water- (Worry-free even on light ) Package Contents: 1*Bike Seat Bag Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.