ORESAI Mens Outdoor Mountaineering Riding Backpack 35L Blend Import 75% Nylon,20% Blend.Lining Material Mercerized Cotton Unit Dimensions: 19.6 inches H x 12.9 inches W x 7.4 inches T Durable Material,Multi Pocket Design,Multi Functional,Multi Purpose,Secure High Quality MOLLE external expansion system designed to be used in combination with other equipment,you can load pockets,water bottle bag,accessory kits and other sweat, also it's more comfortable for your back Powerful suspension system, breathable perspiration, relieve burdened the heat could quickly spread out, avoiding the embarrassment of sweat, also it's more comfortable for your back