The Rivers West APEX Wool Base Layer top is sewn from 100% Merino wool and is the perfect wool top under any attire. Hunting, skiing, fishing, camping .... or you name it, this wool top is going to keep you warm and comfortable in all outdoor activities. And this fine gauge wool top features exceptional moisture management along with the scent control power of anti-microbial control. 2 buttons on the henley style neck mean an easy on - off and ventilation as the morning warms. Stay warm and dry while spending your day in the comfort of a new APEX wool top.