* IPX-7 waterproof zipper provides leakproof and increase air tightness.

* The water bladder holder inside main compartment for  2L BPA FREE & food grade hydration bladder

* The removable insulated drinking tube has a click-in connection, eliminating the risk of loose connections and leakage.

* Reflective strips around front pocket zipper and two auxiliary zipper loops serve as reminder of safty for nigt time riding or walking.

* 4 elastic cords and fasteners that can hold two trekking sticks or fishing rods.