Filson long johns are knit from extremely fine fibers, that result in a smooth finish from the yarn's tight "worsted" twist and unparalleled comfort that lasts. The result is unparalleled comfort that lasts. Wool absorbs up to 30% of its own weight in moisture without feeling damp or clammy, and wool helps neutralize odor too. Smooth fit for layering yet cut generously enough for ease of movement. Features include a long tail for tucking into pants, crew neck top. Ribbed cuffs. Imported.