These are original patented nipple covers designed for sports chafing prevention, suitable for both men and women. Made of thin, breathable and skin-friendly hypoallergenic material, they fit snugly to the skin without easy falling off during exercise. Ideal for long-distance running, cycling, hiking, gym training and other outdoor and indoor sports scenarios. They effectively block friction between nipples and clothing, avoid painful nipple chafing and bleeding, and stay comfortable through long workouts without causing extra burden to your body.