Details A breathable merino technical top, designed to naturally regulate your temperature, control odor and keep you comfortable when you're working hard in the widest range of conditions. Made from a blend of 65% RWS-certified merino wool and 35% recycled polyester. All of the virgin wool Patagonia sources is certified to the Responsible Wool Standard (RWS) from farm to fiber to help ensure protection both for the animals that supply it and the land they graze. Fair Trade Certified™ sewn. Material 3.5-oz 65% RWS-certified merino wool/35% recycled polyester jersey Fit Slim fit Details Soft, comfortable, next-to-skin blended fabric wicks moisture, dries fast, naturally regulates your temperature and resists odor Tank style for enhanced movement Side vents with slight drop tail RWS-certified, chlorine-free merino wool. All of the virgin wool Patagonia sources is certified to the Responsible Wool Standard (RWS) from farm to fiber to help ensure protection both for the animals that supply it and the land they graze Back-neck yoke with hanger loop Woven P-6 logo at left hem Fair Trade Certified™ sewn Weight 74 g (2.6 oz) Patagonia Capilene Cool Merino Tank Women's