Made of high quality polyester fabric with TPU outer material. Suitable for untrained puppies and dogs who suffer from excitement urination or incontinence. Ideal for protecting carpets, floors and furniture from damage caused by dog urine and faeces. This washable nappy is economical and environmentally friendly. Saves a lot of money compared to disposable nappies. Size: M: Waistline 13.4 - 17.3 inches (34cm-44cm) L: Waistline 17.3 - 21.3 inches (44cm-54cm) XL: Waistline 21.3 - 27.5 inches (54cm-70cm) Attention: Measure the waistline of your dog as the picture shows, in front of his legs. If the waistine is in between sizes, please choose the small one when he is skinnier; otherwise,choose the large one when he is heavier. Water absorption test results: M: 70ml L: 100ml XL: 180ml