Sweat activated what? Yes, the Zero Rules polo has sweat-activated, super-cooling technology, and that’s not all. It also wicks and has UPF 30 protection from the sun, and features comfort stretch fabric. Technically, it’s a great shirt.

- Omni-Freeze ZERO™ sweat-activated super cooling - Omni-Wick™ - Antimicrobial treatment protects this product from bacterial growth - Center Back Length: 27" - Uses: Trail