Men’s Reaxion Amp T-Shirt. Made from a soft, breathable fabrication, the Reaxion Amp T-Shirt is designed to move with you. • Fabric | 132 G/M², 100% Polyester-Knit Jersey • Sizes | XS-XXL • Soft hand screen-printed graphic • Set-in sleeves • Drop-tail hem • Locker loop • Pop saddle stitch