The Mons Royale MERINO THONG is designed to be worn comfortably under your leggings, whether you're at the gym or on the hill. Its super stretchy blend of merino wool and nylon ensures reliability and comfort throughout a fully active day. Thanks to the remarkable properties of wool, it provides warmth in the cold, quick drying, and temperature regulation in various conditions. The wider rubber hem keeps the thong securely in place.