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 thats not too tight or too loose – 100% Polyester. Machine washable