The bum bag exterior is crafted with 51% recycled polyester, created by reprocessing existing materials. Recycled blend faux leather exterior. Twill texture with smooth trim. Adjustable crossover/waist strap. Strap length: 102cm/40.2in - 140cm/55.1in. Zip top fastening. Exterior pockets at the front and back. Interior slot pocket. Shiny silver D-ring, speed clip and pullers. H: 13.5cm/5.3in L: 35cm/13.8in W: 3cm/1.2in. Calvin Klein shiny silver metal logo on the front. 51% polyester, 49% polyurethane. Country of origin: China. Colour: black