What is Chillybuddy? Chillybuddy (Patent Pending) is a light-weight mesh cooling jacket designed specifically to help keep a dog comfortable in hot weather and reduce the effect of exposure to the sun. The jacket's outer layer is made of woven synthetic with an aluminized finish. The twisted strands of the fabric function like thousands of tiny mirrors, reflecting all wavelengths of light away from the surface. The jacket is lined with a cotton mesh. Both layers allow air to pass freely through. The cotton mesh liner can be wetted to provide substantial evaporative cooling. Unlike other wet jackets, the evaporation occurs in the shade of the outer layer, creating an unusually cool environment on the hottest days. Facts about Chillybuddy: Chillybuddy jacket can significantly lower coat temperature and provides a shield from direct sunlight. On a 90° F day, wearing a Chillybuddy jacket can lower the coat temperature from 145° F to 103° F, a reduction of almost 30%. Soaking the Chillybuddy in water to dampen the cotton lining before use can lower a dog’s coat temperature by a further 20 degrees--from 103° F to 83° F. Cotton has been repeatedly shown to be the best fiber to hold water for evaporative cooling. Synthetic wicking fabrics are useless in this application because dogs do not sweat. For light-haired dogs, a Chillybuddy jacket also protects the underlying skin from sunburn.Chillybuddy can protect coats of show dogs from bleaching by the sun -- which often occurs as summertime reddening or browning, especially at the tips of the coat. The Chillybuddy jacket was field-tested in mountain terrain and open-field hunting. It is durable, tear-, snag- and run-resistant under repeated use in rugged outdoor conditions, withstanding thick brush. How to Measure your Dog: NECK: The circumference of the dog’s neck at its widest point. BACK LENGTH: The distance between the collar and the base of the tail. GIRTH: The circumference of the dog’s chest at its widest part. It is important to note that the back length is the most important measurement of the three. The Chillybuddy jacket provides room for adjustment in the girth and neck straps so it is crucial that the Chillybuddy you get covers the length of your dog's back. When in doubt, a little excess on the back length is better than having it be too short. Petite X-Small Small Medium Large X-Large XX-Large Neck 11-15� 12-15� 15-18� 17-20� 21-25� 26-29� 27-30� Back Length 13.5� 16� 19� 21� 24� 31� 33� Girth 16-20� 18-22� 22-24� 22-29� 24-31� 26-34� 33-39� All measurements are in inches. Chillybuddy Styles: Sport & Casual Chillybuddy Sport: Chillybuddy Sport is designed for the dog that plays, runs or works in the woods or any other rough terrain. Its innovative design allows the jacket to stay securely on your dog throughout the most active conditions. Chillybuddy Casual: Chillybuddy Casual, the everyday cooling jacket, is designed for the dog who enjoys playing, walking or even running outside in basic city and suburban conditions. Easy to put on, easy to take off, Chillybuddy Casual will always keep your dog cool on hot days Testimonials "Chillybuddy working incredibly well with Bailey. On the boat--yesterday w/out it he was miserable. Not even panting today!!" Dave W., Annapolis, MD "Chilybuddy is definitely a miracle--it worked so well on Kiki! The ChillyBuddy had immediate impact on the temperature of my dog's coat. I could not believe how long she will stay outside in the sun and enjoy it." Charlie G., Annapolis, MD "My little girl, who usually HATES more than a few seconds in the heat of mid-day, was actually running happily in an open field with her Chillybuddy jacket on!" Jill S., Rockville, MD "Really cool product (pun entirely intended!). The dog loves it and is now really enjoying her afternoon walks instead of laying down in protest halfway through. Thanks for a remarkable product. I've already recommended it to all the neighbors. Bella is a great spokesdog for the product, especially with that stunning silver color on her black coat." Nancy B., West Boynton Beach, FL