FIT & DESIGN: IMPERMALITE®: Superior water protection. A lightweight, breathable, microweave shell provides unsurpassed performance and comfort. 4-Way Stretch Woven Material 1/4 zip Wind resistant Side Expansion Zipper For Easy On/Off ADDITIONAL DETAILS: A must have for any serious player or coach, the Mizuno Short Sleeve Hitting Jacket is made with a premium, comfortable and ultra lightweight stretch woven fabric that is also wind resistant. Designed with a front 1/4 zip construction and 1/4 zip side expansion opening to make this the ultimate hitting jacket. Mizuno Boys' Hitting Jacket 1/4 Zip Short Sleeve Pullover