When we're ready to escape from the bustling city streets and the summertime heat, we throw on the Icebreaker Merino 150 Tech Lite Skiing Yeti T-Shirt and head for the mountains for a quick reset. The lightweight tee is made entirely of Merino wool. This soft, breathable miracle material helps us stay cool when it's warm and warm when it's cool, so we can spend long hours outside chasing sunset views or swinging our feet in a hammock creekside.