DeMarini Boys' Demarini Youth Long Sleeved Performance Baseball Team Shirt 91% Polyester 91% Polyester; 9% Spandex; Machine Washable The comfort-fit design of DeMarini's team shirt is built to be worn under your game jersey or as a workout shirt. It is custom fitted so that your team shirt is not too tight or too baggy. Body-mapping mesh inserts provide breathability and the body fabric stretches in all directions to allow a full range of motion. The anti-microbial protection inhibits bacterial growth, protecting against stains and odor while the moisture management system wicks sweat away from the body to keep players dry and comfortable allowing them to perform at the highest level. Vietnam