NIKE Women's Diamond Arm Band for I-Phone 5 Compatible with iPhone 5, 5c and 5s / Water-Resistant Pocket - Yields protective storage. Clear Window - Touch-screen compatible and protection provided. Compression Moulding - For increased airflow./ Fused Construction /seamless comfort and durability. Velcro brand fastener - With double D-ring construction provide a secure, custom fit. Strap length: 19cm