SmartWool Men's PhD Tight 44% Nylon, 36% Merino Wool, 20% Elastane Knit in Vietnam Regular Fit; Mid rise - Knitting method concentrates Merino against skin and nylon/elastane against the elements Striped drawcord for customizable waist fit - Secure zip pocket on back with semi-auto locking zipper pull and drop-in pocket on left side for additional storage Size M inseam: 28.5IN (72cm) Style:SW016102