The outer side of Ecopipo night time/after birth pads are made of PUL (waterproof) to keep your cloth dry and accident free, however it allows your skin to breath making you feel fresh. Inside the pad there are layers of bamboo, making them very absorbent. On contact with your skin the pads have a layer of microfleece, which is extremely easy to wash apart of keeping you fresh and dry. They have an anatomic shape that adapts to your body and they have wings and a poppers to keep them in place. Ideal for heavy flows.