The backpack has a built-in water bag compartment

this 10 L hydration backpack is your ultimate companion for every ride

cargo versatility

Experience the perfect blend of innovation

rockbros rainproof bicycle bag shockproof bike saddle bag for refletive rear large capatity seatpost mtb bike bag accessories Ships From:United States The backpack has a built-inSPECIFICATIONS is_customized: Yes Type: MTB Bike Accessories Size: About 18*7. 5*7cm,21*8. 5*8cm Origin: Mainland China Name: Bike Saddle Bag Cycling Rear Seatpost Panniers Model Number: C27 1 Material: Polyster Location: Rear Seatpost, Frame Function: Rainproof Feature: Rainproof, Shockproof,Portable Design: Waterproof Can Hanging tail light Easy to install Color: Black Capacity: About 1L and 1. 5L Brand Name: ROCKBROS Product Details Brand: Rockbros