ONTYZZ Backpack 12L Unisex Nylon Waterproof Sport Backpack for Fitness

• ✔ The multifunctional outdoor backpack with many storage compartments offers plenty of storage space. And you can expand the capacity of the backpack by opening the zipper around the small backpack

• ✔ The lightweight backpack with adjustable chest straps, waist straps and straps if necessary could prevent the backpack from shifting all the time on your back when walking, running, cycling, etc. The waist straps can be stowed in the hidden pocket when you don't need them

• ✔ The 12L bike backpack has an insulated water bladder pocket. There is a hook to hang the water bladder and slots on the 2 straps to allow the hose to come out (the water bladder is not included)

• ✔The surface material of the hydration backpack is waterproof. The hiking backpack could keep the contents dry for a short time in light rain. Because the back of the backpack and the zippers are not waterproof. But the different thick pads on the back can help to relieve the back

• ✔ The bike backpack with mesh helmet pocket has reflective strips and emergency lifesavers to make cycling safer and more comfortable. The mesh pocket can be hidden and zipped into the pocket when not in use