Argo VestArgo vest, wear something under or not This is a classic fit button up vest. It's made from stretch linen Tencel lyocell yarn that's naturally breathable for all season wear. Linen is made from flax. Linen is woven from yarns spun from cellulose flax fibers from the stem of the flax plant. It uses less water, less pesticides, less land and easily grows. Linen and Tencel are biodegradable and can revert back to nature.