Not much radiates " cool" as well as a sheep in aviator's glasses does. And not much will help keep you as cool as our Sport 150 fabric, which combines the odor resistance, temperature regulation, and breathability of responsibly sourced Merino wool with the quick dry times of polyester. With a free-to-move regular fit and a functional racerback design, our Women's Merino Sport 150 Aviator Sheep tank is a wardrobe essential for anything from a high-intensity workout to an afternoon of gardening.