Feature:1. The backpack is equipped with a built-in water bladder compartment, freeing up your hands. Riders can replenish their hydration in a timely manner while riding.2. Made of splash-resistant nylon fabric, it is wear-resistant and tear-resistant, with a long service life.3. The carrying structure leaves an upper and lower channel conducive to air flow, effectively reducing sweating.4. The backpack adopts a breathable mesh design, which can quickly dissipate sweat and heat.5. The backpack strap is enhanced with a high-visibility reflective strip, making night riding safer.Specification:Whether you're attending a rave, embarking on a hike, going for a run, or Cycle, this hydration backpack provides ample storage for all your essentials.Features:The backpack is equipped with a built-in water bladder compartment, freeing up your hands. Riders can replenish their hydration in a timely manner while riding.Made of splash-resistant nylon fabric, it is wear-resistant and tear-resistant, with a long service life.The carrying structure leaves an upper and lower channel conducive to air flow, effectively reducing sweating.The backpack adopts a breathable mesh design, which can quickly dissipate sweat and heat.The backpack strap is enhanced with a high-visibility reflective strip, making night riding safer.Specifications:Material: NylonCapacity: 12LSize: 27*12*40cm/ 10.6*4.7*15.7inWeight: 464g/ 16.4ozPackage size: 45*28*5cm/ 17.7*11*2inPackage weight: 492g/ 17.4ozPackage list:1 * hydration backpackPackage List:1 * hydration backpack