Our friend at Hampui crafted this special hat using their signature 200-gram blend of free-range Bolivian and Argentine wool for iconic style, adding a simple, leather band to finish. HAMPUI: Rugged, yet always-refined, adventuresome Hampui hats are handcrafted from beautiful, sustainable materials that showcase the magic of the natural world. Wool Felt with leather band. Hand screen printed, breathable liners and sweatbands. Handmade in Hampui's partnering family-operated factory in Bolivia.