NipGuards were designed and patented (by marathon runners) as a foolproof solution to prevent nipple chafing and abrasion without the need for reapplication during a workout and without staining shirts. NipGuards are effective over any distance and in all weather conditions. In fact, NipGuards are 100% guaranteed to work in the most grueling tests of human endurance and in the most extreme weather conditions. Whether it’s a simple training run or competing in a 100-mile ultra marathon or a full triathlon, NipGuards are a proven and effective way to prevent unnecessary nipple chafing and abrasion. NipGuards use a safe, medical adhesive that is applied directly to the base of the nipple and not the chest – so sweat does not affect the adhesive – and chest hair just needs to be pushed away. NipGuards are waterproof and are effective in the rain. Each disposable pair of NipGuards is good for one workout – typically a long distance training run or competition. If running through pain is what you do best, then let NipGuards help you only feel the good pain.