The outer packaging size of the vest is 35*30*2CM, 180.8 grams Lightweight breathable hydration vest backpack designed for running,cycling and marathon sports.Adjustable shoulder and chest straps fit different body shapes.Stable bottle pockets can hold water bottles for quick hydration during exercise.Multi‑compartment design stores mobile phone,keys and small personal items.Soft elastic fabric brings comfortable wearing for long‑time outdoor training.