1Composed of 3 layers, including bamboo charcoal fiber inner layer, microfiber middle layer and PUL outer layer 2Microfiber inner layer is super absorbent for keeping dry feeling. Bamboo charcoal fiber middle layer is antibacterial, healthy and soft for your skin. PUL outer layer is waterproof, it could prevent leaks 3The wings have plastic snap fastener allowing them to be clipped around underwear for extra security 4Reusable and washable, rather than throwing them away after one use, simply toss them to wash and use them again 5Made from renewable and plentiful resources, which contribute to the health of the planet and environment. It's better than disposable sanitary napkin!