[Adjustable and Non slip] Strap can be adjusted to fit from 10.5inch to 15inch arm, this will fit most male and female adults. The non-slip material ensures a comfortable fit without the armband annoying you when slipping down your arm [Accessible] Headphone port can be accessed easily through universal slots cleverly located at the back of the holder allowing you to listen to your favourite tracks while you exercise [Quality] Made from premium quality neoprene and PU to ensure a comfortable non slip fit whilst minimising the weight. The viewing widow will also protect the screen of your phone without comprising the sensitivity of your touch screen [Sweat Resistant Design] Our sweatproof design allows you to exercise without sweaty discomfort and unwanted movement of your armband. The armband also has a reflective strip to keep you safer in the dark [Convenient] we have also inventively implemented a storage pocket especially for a key, allowing you to exercise carefree. The armband can also be easily stored away in your gym bag without taking any space or adding any weight This is the ideal gadget and storage solution when exercising indoors and outdoors. This stylish armband is great way to store your phone and key whilst comfortably keeping them safe on your body. This carefully thought out armband is packed with feature that will enhance your exercise routine. The armband is constructed from soft non slip neoprene and PU to ensure comfort and protection. We have also thoughtfully made adjustments to the case to allow access to your phones headphone port and touchscreen at all times. This armband is fully adjustable and will fit from 10.5inch to 15inch arm. We do not recommend you buy this item if you do not fall into this size bracket. Please note touch ID will NOT work with this armband. You will need to unlock your phone using your pin when inside the casing.