When the temperatures drop, make sure to pull on the Indera 2-layer HydroPur® Rib Knit Performance Thermal for the ultimate in warmth. This thermal top is made with 7 oz. 100% HydroPur® on the inside and 70% polyester, 30% Merino Wool outside. This heavy weight material wicks away moisture leaving you warm and dry during the colder weeks. Indera added scent blocking fibers to the performance thermal to help reduce odor for long wear. The rib knit cuffs are an added bonus because they lock in the heat and keep out the cold.