WRIST-BASED HEART RATE - The watch constantly samples your heart rate2 and will alert you if it stays too high or too low while you�re at rest

Hidden zip pocket at wearer's right and regular mesh pocket at wearer's left

Meant for 31in pace clock

Sash-style halter ties

Enhanced peripheral view is ideal for races and meets

Quiksilver Boy's All Time Short Sleeve Fitted Rashguard YGroup_8642846490792 WRIST-BASED HEART RATE - TheStay protected from the harmful rays with the comfortable Quiksilver Boy's All Time Short Sleeve Fitted Rashguard. The sun protecting fabric helps to keep his skin protected. Fabric & Care 92% Polyester, 8% Spandex. Rinse after each use. Hand wash; hang to dry. Details UPF 50+ sun protection surf shirt. Flatlock stitching: Prevents chafing. Sizing & Fit Regular fit. Short sleeve style. Low neck design.