The expandable center waist pocket is waterproof and helps keep your phone safe. Ultra-light stretch fabric for unrestricted movement. 4-Way Stretch technology allows for better movement in every direction. The material drains sweat away and dries very quickly. Laser perforation for better ventilation. Soft knitted belt with outer drawstring. Secure zipped pockets with internal media pocket on the right side. Leg span: 17.78 cm. The front Speedpocket comfortably fits most phones up to 15cm x 7.5cm.