Flexible mesh pouches in three sizes, one for compression. With hook Velcro back for modular use. The back is also covered for universal use. The set consists of four pouches. Velcro straps on all pocket backsides (loop Velcro) Blind Velcro available Consists of 4 pouches in 3 sizes Lids made of mesh, Small size with vinyl Specifications MATERIAL: 200 den Polyester PU, 150 den Polyester Mesh Pouch Sizes/Dimensions: 2 -S: 6 x 4 x 2in - 15 x 11 x 6cm | 1.75oz - 50g 1 -M: 7 x 6 x 3in - 22 x 15 x 7cm | 2oz - 65g 1 -L : 12 x 9 x 6in - 30 x 22 x 15cm | 4oz - 125g