The lightweight 784 Ultra Batter"s Ergo Sleeve Elbow Guard weighs less than 4 ounces and is a revolution compared to heavier, bulkier batter"s elbow guards. The Quick Fit Sleeve design gives you optimal fit, protection and targeted compression without the cumbersome strapping of old school elbow guards. An Anatomical Low Profile shape integrates ShockSkin elbow/arm protection and full-flex Motion 360 design that protects you and lets you swing naturally without restriction. For max protection, the ShockSkin padding integrates optimal foam densities layered with an internal hard elbow cap. Anatomical low profile design integrates ergonomically molded elbow-arm coverage within a comfortable compression sleeve. Motion 360 full-flex design provides an unrestricted natural swing to maximize batter performance. ShockSkinTM contour thermal molded protection integrates optimal foam densities layered with an internal hard elbow cap and continuous elbow/arm coverage. Anti-microbial moisture wicking fabric wicks moisture away from the skin to keep you dry and cool. Quick-fit sleeve with targeted no-slip compression offers quick and comfortable fit without need of straps. Measure elbow circumference 2" from elbow tip: S (8.5-10"), M (9.5-11.5"), L (11-13") and XL (12.5-14.5").