The HyperFlex Pullover is constructed from an ultra lightweight woven and knit material mix that delivers a protective shell with stretch properties to allow for unencumbered swings at the ball. The DWR finish helps to repel water in light rain or mist. Wind-proof, water resistant. Lower Back Pocket converts to a stuff sack. Extended Half-Zip Construction. Lightweight Stretch Woven Fabric. Knit Lower Sleeves. Back Center Panel for added mobility.