Features:Waterproof polyester material is anti-scratch, abrasion resistant, durable and assured to use.Three-dimensional design, can quickly heat dissipation, sweat ventilation, distribute heat evenly and keep the back in a dry state.Designed to fit the structure of the back of human body, effectively disperses pressure and brings extremely comfortable feeling.Fixed system design, can be used to fix alpenstock, quality assurance.Large capacity stratified zipper bag design, convenient for the classification of goods to carry, carry more clothes, travel more convenient.Ideal for outdoor activities, such as camping, hiking, climbing, cycling etc.Specification:Optional Color: Red, Green, Blue, Purple, BlackMaterial: Polyester Size: Approx. 56 x 36 x 23cm / 22.0 x 14.2 x 9.1inCapacity: 50LWeight: Approx. 765gPackage List:1 * Backpack.