Mammut Men's Long All-Year Pants Polyester 75%/Wool 25% Imported Midweight quality: merino wool and polyester mix with waffle backing structure for optimal insulation on rapidly cooling parts of the body Uncompromising combination of top high-end functionality and youthful design The extended back protects sensitive areas from chills Lightweight quality: merino wool and polyester mix for optimal temperature balance Antimicrobial feature to avoid unpleasant odor