Breathe 1/2 Zip Baselayer. Whether you're heading out for a ride or running errands, this lightweight baselayer keeps up. The recycled, performance knit fabric has beautiful mesh on the sleeves and side panels for unrivaled breathability when your ride heats up. Ariat TEK® is designed for optimal comfort in any weather. Climate TEK™ dynamically responds to your body temperature to keep you cool when things heat up. Fresh TEK™ sustainable odour-resistance. Mock collar with quarter-zip styling. Perforated panels for breathability.