Customized Sport Tek Youth or Adult (Add Any School/Team) Baseball T-Shirt After choosing your tee color and size, Click the "Customize Now" button to choose the text you would like screen printed in the design on the front of the shirt. Available in Youth and Adult sizes: please refer to product description for exact measurements. Sport Tek brand, 100% polyester pique with PosiCharge technology. Contrast color 3/4 length raglan sleeves with scalloped hem. Vintage look with moisture wicking technology.