Smartwool Men'S Merinomax Half Zip, Pesto, Medium Knit in Vietnam of 97% Merino Wool, 3% Elastane; Semi-Form Fit MerinoMax Double Jersey knit 13" (34cm) zipper Secure zip chest pocket with media cord routing Low-profile in-seam thumbholes at cuffs Flatlock seam construction designed to eliminate chafing