The Ancol Cooling Vest will keep your dog nice and cool as temperatures heat up. Simply immerse the vest in clean cold water for one minute, until it is fully saturates and gently wring out the excess water. Fit the vest onto your dog and the ‘kelvinator effect’ of the moisture evaporating from the vest ensures that your dog’s temperature will be reduced. As the vest slowly dries, just re-soak it, to re-engage the cooling properties. The Ancol Cooling Vest is antibacterial and machine washable. Measuring Your Dog For Their Coat:When measuring your dog for their new dog coat, it is important that you measure from the base of the neck to the start of the tail. This is where the head joins the body and where the tail joins the body. Make sure your dog is standing squarely upright on all four legs and is looking straight ahead for an accurate measurement. Once you have done this you then need to refer to the size chart. If your dog’s size does not match the size we have, then you should round up for dogs with downward tails and round down for dogs with upward tails.Sizes:Extra Large – 60cmLarge – 50cmMedium – 40cmSmall – 30cmExtra Small – 25cm**PLEASE NOTE: Should you need to return this item, please ensure that it is in the condition it arrived complete with tags and original packaging to be eligible for a full and immediate refund/exchange.