This synthetic Stay Dry Mat lets dry air circulate through your pet's bedding keeping them warm, dry & comfortable. Flea, chew & stain resistant, it is machine washable & pre-sterilised - perfect for the older pet or young puppy in training. This is the matting that vets & breeders use in their carriers & cages - it is autoclavable - meaning it can be sterilised under pressure (impressive huh!). Perfect for expecting mums, incontinent dogs & puppies in training. Please note the Stay Dry Mat in Grey is not waterproof. Moisture and urine immediately sift through the top pile to the non-waterproof backing keeping your pet dry. The design of the fibres means that moisture does not travel back up through the pile - how clever!