As a product to replace the disposal,Outside of the cloth incontinence underwear is made of polyester,so it is washable and reusable,TPU coated on the polyester made the underwear waterproof,Microfleece inside the underwear keep your body dry.You can adjust it quickly with snaps from waist 27 inches to 39 inches.Each underwear comes with NO inserts,you can buy the microfiber inserts from the listing seperately.