THE ORIGINAL HAPPY HOODIE, since 2008MADE FOR GROOMERS, BY GROOMERS. With over 27 years combined experience in the grooming industry, the founders of Zoni Pets, LLC set out to create Happy Hoodie - a soft, expandable fabric band that makes force drying (and grooming) less stressful for pets. Happy Hoodie is the FORCE DRYING MIRACLE Hoodie for pets that groomers have come to love!CALMS, COMFORTS AND PROTECTS PETS. The gentle compression reduces noise and has a swaddling effect that can relieve a dog of anxiety, stress, fear and aggression.SIZE GUIDE. Please refer to listing photos for measuring instructions and size guide. A snug fit is often more helpful when a pet is very upset (such as force drying and fireworks). For a looser fit, choose a larger size Happy Hoodie for your dog’s head size (good when wearing for longer periods, such as post-surgery care, aerating the ears, and preventing or healing hematomas).EXAMPLE, a dog with a 15” head circumference can use the small size for a snug fit, or the large size for a less snug fit.PLEASE KEEP IN MIND, IT IS EASIER FOR A PET TO REMOVE A HAPPY HOODIE THAT HAS A LESS SNUG FIT.Never leave your pet unattended while wearing happy hoodie.HOW TO USE. Simply place Happy Hoodie over the pet’s head and onto its neck. Place the ears against the pet's head so air cannot get into them and slide the band back over the top of the head to secure the ears in place. Adjust the size of the band to best fit the pet by folding over excess material once the band is on.Please note, when there is nothing upsetting a pet, some pets may not be very receptive to wearing Happy Hoodie; however, most are VERY appreciative with having it on during a stressful situation. We understand, it's hard not to try out a new purchase as soon as it arrives, just don't be discouraged if your pet doesn't embrace their new anti-anxiety aid if you try it on them when they are not upset.