Mons Royale Folo Brief are super soft, lightweight and naturally breathable thanks to our Merino Air-Con fabric. FOLO is designed for multisport use in all conditions. Monshigh performance merino underwear provides athletic support and natural temperature regulation with bold, contemporary style. 140 Merino Air-Con is ultra-lite and ultra breathable for year round use. Mons slim-line waistband 140 Merino Air-Con is ultra-lite and ultra breathable for year round use Fabric: Merino Air-Con Material83% Merino Wool, 13% Nylon, 4% Elastane