Pet Cooling Vest with 3 Size to Choose: S size with 6 ice packs, fits chest circumference from 15.7 inch to 19.7 inch. M size with 8 ice packs, fits chest circumference from 19.7 inch to 23.6 inch. L size with 9 ice pack fits chest circumference from 23.6 inch to 27.6 inch. Easy to put on and off thanks to the adjustable elastic cord strap. Features Special Cooling Technologies: This cooling vest harness is made with a high technology gel materials which allow it to retain cool for hours longer than an ordinary sponge or cotton towel,keeps your dog cool during hot summer days. Reusable and hand washable. Soft Material and Bright Printed Pattern Design :100% non-toxic fabric, the surface material is high quality canvas cotton soft gel material padded, comfort and breathable. Cute pattern and bright color will make your dog stand out from the rest, really adorable and relieve heat stress and lower body temperature; your dog will love it. Adjustable Buckle Strap with Aluminium-alloy D Ring Design : Very Easy To Put On,pull the dog cooling vest over your dog's head and adjust the chest buckle to complete the fit and it won't slip off easily. With the Double D ring, which is convenience to lead leash for dog walking. Simply Freeze and Use: You only need to put the ice packs into refrigerator for several minutes, it will bring cooling for pets. At the End ,please measure your dog's chest and neck according to the size chart before ordering to ensure the most comfortable cooling for your dog.