This custom made water resistant armband for Sony Walkman NWZ-A15 NWZ-A17 MP3 High Resolution Audio Player (A-Series) is designed specifically for your device. Made from water resistant neoprene material with reflective banding for added visibility when running at night. Silicone dimples on the back on back and straps grips the armband in place, stopping any slips down your arm. Perfect for use in the gym, jogging, cycling, beach, etc. Fully adjustable. Please note that headphones are not included with this case