Once you run with a UA Speedpocket you'll wonder how you ever ran without it. It expands to hold even a plussized phone keeps it secure and won't let it bounce. Lightweight stretch woven fabric is comfortable & durable with side mesh panels for added ventilation. Expandable center-back waistband pocket is water-resistant & keeps your phone secure with no bouncing. 4-way stretch material moves better in every direction. Built-in brief for enhanced coverage. High-rise soft knit waistband with internal drawcord. Fitted fit: Streamlined fit that’s not too tight or too loose. 100% Polyester. Machine washable.