Made for your most dynamic aerobic activity, this technical shirt beats the heat with our sweat-activated cooling technology. It ensures to keep you with the ultra-wicking, cooling fabric manages sweat by reacting with your sweat to lower the material’s temperature.Feature: Omni-Freeze ZERO™ sweat-activated super cooling Omni-Wick™ Modern Classic Fit Comfort stretch This product incorporates an antimicrobial treatment intended to protect the product from bacterial growth. The active biocidal substance is: pyrithione zinc. Columbia Zero Rules Short Sleeve Tech Tee Bright Indigo 1533313