Biothermal is the ultimate, technical performance garment. Featuring 49% MTF polyester and 51% Bio-silver nylon (silver embedded nylon) . It has the Acclimate moisture management system and inherent anti-microbial properties. Protection lasts the life of the garment. Performance fit. Added warmth without bulk. Textured finish for a distintive look and feel. Flatlock stitching ensures comfortable fit. Reusable packaging. Made in Canada.