New Old Stock Duofold Sportsman-Mid Weight Insulation Thermal Pants, Men’s Medium 32-34” Waist, Color-Grey, Inner layer 100% Polyester, Outer layer 70% Polyester 30% Merino Wool. Two-layer construction creates a thermal barrier against the cold. Combines the natural insulation of Merino Wool with the performance of polyester. Superior moisture management. Designed for a wide variety of outdoor occasions. No scratch, tag free labels. With Duofold Mid-weight base layer, an outer layer of Merino Wool blend provides natural insulation and warmth, while a wicking polyester inner layer keeps you comfortable and dry.