This custom made water resistant armband for Sony Xperia M4 Aqua 8GB 16GB 4G LTE Android Smartphone 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.