Sweat activated what? Yes, the Zero Rules polo has sweat-activated, super-cooling technology, and that’s not all. Technically, it’s a great shirt.

Features:

• Moisture wicking technology
• Sweat activated cooling rings lining the top
• Comfort stretch for freedom of movement
• Incorporates an antimicrobial treatment intended to protect the product from bacterial growth. The active biocidal substance is: pyrithione zinc
• Centre back length: 27"
• This top is true to size. Columbia recommends purchasing your usual size
• Active fit: Body skimming fit with end-use mobility in mind
• Materials: Omni-Freeze ZERO™ Interlock 100% polyester