**** Fits most large format Android and Windows Mobile phone models (Galaxy S3 & S4, HTC One, Nexus)****Underfuse is a performance iron-on pocket specifically designed for working out, running, and travel. It can be used to hold your phone, mp3 player, keys and cards. The pocket is joined to a special woven fabric infused with adhesive. The adhesive is specially formulated to bond to your favorite workout gear with a regular household iron. Underfuse has been tested to be as durable as the item your are attaching it to. Why Underfuse? The current methods of holding your items while working out are inadequate. When you are at the gym or out for a run you always struggle to find a good spot to put your phone, mp3 player, keys and cards. If you put it in your pocket then its bouncing around when you run or falls out when you lift or do sit-ups. Many women don"t even have pockets on their workout clothing! Underfuse solves this.