Armpocket Aero i-10 armband for iPhone SE, 5/4 or devices and cases up to 5" Memory foam padding for comfort. The memory foam construction allows the armband to mold to the shape of your arm,the foam expands as it warms to secure the device in place Weather proof and sweat proof with patented slip-proof design Interior storage compartments for ID, keys and more Strategically placed audio access ports Constructed of durable, sustainable Eco-friendly materials that will outlast the life of most phones and devices