SmartWool Reversible Pattern Headband 100% Merino Wool - Water resistant; wind resistant; superbly comfortable; super breathable. Double Layer Interlock Knit - For maximum warmth and versatility. Reversible - For a neat change-up in style. Heat Transfer Logo - Finishes the piece in an unmistakably SmartWool aesthetic. Clean Finish Seams - For a bulk free fit.