Comfortable 100% waterproof Arm Pack suitable for all sports and activities - especially those on the water. Constructed from black opaque environmentally friendly TPU (for complete privacy and protection), and seals tight with OverBoard's patented Slide Seal System. 100% Waterproof. Floats safely if dropped in water. Guaranteed submersible to 19ft./6m. Keeps out dust, sand and dirt. Supplied with neoprene Velcro sports arm strap, neck lanyard, anodized aluminum carabiner and desiccant sachet. Perfect for storing your phone, keys, cash and credit cards. Max length: 9 cm./4 in. Max circumference: 13cm./5in.