Batting Practice jerseys have been are now made with a Cool Base temperature-control technology! These keep you cool, dry and comfortable by technologically advanced fabric that wicks away moisture from the body Vented stretch-mesh armhole and side insets Same exact jersey the players wear on the field for BP and Spring Training.100% polyester Single button pullover top Why wait 4-6 weeks from other sites and pay more?? Average turnaroundtime here 10-14 days- in stock items ship right away.