Altosy 40l Outdoor Sports Hiking Camping Backpack Shoulders Bags Daypack Waterproof Travel Bag 203 Powerful suspension system, breathable perspiration, relieve burdened. Powerful Bear Breathable System, the heat could quickly spread out, avoiding the embarrassment of sweat, also it's more comfortable for your back Safety Belt-carrying back system uses waist made of sponge, while better protecting your waist, your weight decomposition in travel, and it the waist band covered with mesh, it's more comfortable 3 front pocket, A top pocket for cellphone, a big main pocket, 2 side pocket Capacity of 40L, Size: 23.22x14.54x6.37cm