Adult Size Adjustable Diaper Cover Highly breathable and leak-proof, it's received rave reviews from customers. Sizes: S, M, L available. Material: 100% polyester material with a soft touch and excellent breathability. ★ Easy to clean and quick-drying, making it very convenient as it dries quickly after washing. How to Adjust the New Diaper Cover Size: There are 3 rows of buttons from top to bottom. To adjust the waist size, use the Velcro on both sides. To adjust to the diaper size (S, M, L), you can adjust by attaching the third row of three buttons or the fourth row of three buttons to the second row of buttons.