Size: XL Back Length 38cm Chest 52cm Neck 39cm Please measure your dog’s body circumference and choose the correct size before purchasing. Reflects sunlight and overheating: Evaporation accelerates microfibers which reflect UV light and overheat. Not only does it provide coolness, but it also prevents your dog from getting sunburned. LIGHTWEIGHT AND COMFORTABLE: the thermal jacket is light, does not exercise too much pressure on your dog and is very airy, well-ventilated and cool, which makes for an easy and pleasant walk in the summer. Easy to put on, take off and maintain : The ice vest features elastic material and slip-on design for easy on and off. Machine washable. HIGH VISIBILITY: Highly reflective design protects your dog anytime, anywhere during outdoor activities at night. [Easy to use] (1) Soak vest in cold or cold water (2) Dry the water before putting it on the dog (be sure to turn off the velcro) (3) Shake off the remaining water and put it on, cool weather for a walk