How to use: Simply put on these bikini briefs like any other underwear. They're perfect for daily wear, workouts, or travel. Note: Although merino wool is quite durable, avoid sharp objects that could snag the fabric. When it comes to maintenance, it's best to hand - wash these briefs in cool water with a mild detergent. You can also machine - wash them on a gentle cycle. After washing, lay them flat to dry to maintain their shape.