Specially woven fabrics deter most animals from excessive licking. Breathable and light fabric allows for constant air-flow circulation allowing the wound to heal safely.Fabrics are 100% pure cotton and hypoallergenic to prevent skin irritation. Machine washableAdjustable strings ensure a custom and secure fit for animals of all shapes and sizes. For sizing, please refer to the chart in the listing images.For males, untie the last two strings, fold the fabric forward, and retie the strings before going on a walk. This ensures the abdominal area is fully protected when the product is on. Most females do not have to remove the product before performing bodily functions.Size reference:XS: back length 9.8", chest circumference 11.8"-13.8", neck circumference 9"-10.6".S: back length 12", chest circumference 13.8"-15.8", neck circumference 10.6"-12".M: back length 14", chest circumference 15.8"-17.8", neck circumference 12"-13.8".L: back length 16", chest circumference 17.8"-19.8", neck circumference 13.8"-15.8".Please measure your dog's back length, chest circumference and neck circumference before purchasing.