Specification:Material: Nylon Color: Black-Gray Capacity: About 10L Weight: About 330g Size: 29.5*21.5*10cm Scenes: Cycling, Climbing, Travel, Hiking and so on Features:1.Water repellent and tear resistant nylon fabric. 2.Lightweight & Comfortable:With adjustable shoulder straps, waist straps, and chest straps.The soft, breathable mesh pad on the back keeps your back cool and dry. 3.Plenty of storage space：Holds all your gear in the roomy main compartment, inner sleeve, exterior pocket & bungee. 4.Side and front adjustable straps for hanging anything you need. 5.Two sides ofthe external design, can be fxed trekking poles easy to carrycell phone