First on. Last off. A performance merino boxer with Hold 'em fit for superior support. Mons high performance merino underwear provides athletic support and natural temperature regulation with bold, contemporary style. Merino Air-Con is ultra-lite and ultra breathable for year round use. material: 83% merino wool, 13% nylon, 4% elastane cut: boxer brief recommended use: backpacking, casual, hiking, road running, trail running, training manufacturer warranty: limited