KEYWANTS Sports Armband with Key + Credit Card Holder for iPhone Samsung , Water Resistant Soft Lycra Good for Running Biking Walking 1. ADJUSTABLE STRAP: Fully adjustable strap. 5.5" size fits from 11 to 16 inch arm size, 5.0" size fits from 9 to 15 inch arm size. 2. SOFT & WATERPROOF MATERIALS: Made of comfortable high-quality waterproof lycra, super soft and light. 3. WORRY-FREE PHONE OPERATION: Enjoy the full use of Smartphone, Perfect fit for Apple 6+/6S Plus Samsung Galaxy S7 EDGE/S6 Edge+/Note 3/5/7 etc.. 4. SMART DESIGN FOR HEADSET: Easy access to the 3.5mm audio plug for four cut-out ports design. And easy carrying headset Cable for Cable Attachment design. 5. INNER POCKETS DESIGN: Easy to keep mobile, keys, cards & money separately.