Nixx Black Bamboo Period Underwear Sport are lightweight, moving with you while you play your sport and fitting snugly under your clothes or sports gear. Bamboo is a natural antibacterial, keeping you odour free while you exercise and are able to wick moisture away from your body. They are designed to manage your heavy and moderate flow days. Nixx Black Bamboo are black on the inside, so there is no staining. Nixx period underwear are reusable, reducing the need for disposable sanitary products, saving you money and are kind to our environment.