Naturehike Outdoor Sport Drifting 500D PVC Waterproof Dry BagFEATURES: 500D PVC waterproof composite sandwich cloth Thickened 500D PVC waterproof composite sandwich cloth, environmental protection material, good waterproof effect Imitation human back area, 3D mesh back pad It is close to the body's back shape, fixed and inelastic, scientific in guiding and radiating, and does not sweat for a long time Comfortable weight bearing and stable load Mesh shoulder strap, breathable and comfortable, release the