NipGuards are a patented product that have revolutionized the market for protection against painful nipple chafing and abrasion. Used primarily by male athletes (woman typically wear bra's and do not experience the problem), over 1 million NipGuards have been successfully used since the product was launched in 1999. The Individual Runner's Pack shown here contains 10 pairs of NipGuards. Each disposable pair is good for one long training run. NipGuards adhere directly to the base of the nipple and are 100% guaranteed not to fall off until you decide to remove them. NipGuards are used regularly in training runs and all types of endurance competitions, including 10k's, half marathons, marathons, 100-mile ultra marathons and even triathlons (in the water, on the bike and on the run). Quirky product, but they work. Wear them proudly and enjoy your workout... you'll have one less pain to worry about. Remember, some pain hurts so good -- chafing doesn't.