Keep your furry dog babies cool in the Summer heat with this cooling jacket from Le Chien Bleu New York! Includes a harness hole. Features button closures for easy on and off. This is perfect for Summer days relaxing by the pool/beach or on a walk! Size Small (Sizing chart provided from Le Chien Bleu website). 100% Polyester cooling tech fabric. This cooling jacket will stay cool for about 1 - 1.5 hours depending on the weather. For your reference: Instructions provided below from Le Chien Bleu NY website How to use the jacket: 1. Soak it in clean water. 2. Squeeze gently. Do not twist. 3. Shake the wet jacket a few times. 4. Wait for a few seconds for it to cool. 5. Put on the jacket on your fur babies.