Light and breathable: The elastic material has a waterproof film on the inside to prevent perspiration from penetrating. Ensures your items are dry and secure when wet. You won't even notice you're wearing it! SAFETY AND VISIBILITY: The waist bag's reflective tape on the zipper guarantees your safety and visibility at night. This design makes you safer when you run at night. Closure: Zipper ADJUSTABLE AND COMFORTABLE: The elastic strap is universally adjustable, making the fitness bag stay comfortably in place. No more jumping and sliding. Fits most waist sizes. Multi-pocket storage: This running belt has multiple independent pockets to store your items. The separate key pouch can separate your keys and phones to avoid scratching the phone screen or other valuables. Universal Compatible: The running belt pouch is universally compatible with most smartphones up to 6.5 inch diagonal (Changing your mobile phone is no problem - universal fit).