These reusable products are high quality and I only use all the best materials for your reassurance and confidence. They have multiple layers, differing depending what absorbency you require. The patterned 100% cotton layer goes next to the skin. This layer has a little two-way stretch so your pad can move and flex with your natural contours. Next comes the absorbent 100% cotton layer which consists of one layer (medium flow) or two layers (heavy flow) of Zorb which is highly absorbent. Zorb can hold up to 10 times its weight and soaks up to 20 times faster than other fabrics. The next layer is your waterproof layer (PUL) which is supersoft, flexible and breathable. It is also infused with antimicrobial silver ions which inhibit bacterial growth, controlling odours and offering lasting freshness without toxic chemicals. The final outer layer is super soft, eco-friendly 100% organic cotton which is extremely comfortable to wear. Also suitable for light 'stress incontinence'.