Stop problem barking, chewing, and anxiety in your dog the natural way with the ThunderShirt Dog Anxiety Shirt. ThunderShirt's patented anxiety jacket design applies a gentle, constant pressure that has a dramatic calming effect. Using pressure to relieve anxiety in people and animals has been a common practice for years such as swaddling infants and the use of gentle pressure and weighted vests to help people with autism. Features: Over 80 effective Veterinarian recommended Great for fireworks storms separation anxiety travel and more No training required Completely drug-free 100 Money-back guarantee Free shipping Includes: 1 ThunderShirt Intended For: Dogs Color: Grey Health Consideration: Stress, Anxiety, Fear, Scratching, Licking Directions: ThunderShirt is designed to be very easy to put on and take off, with no need for pulling over the head or threading legs through leg holes. ThunderShirt should be worn with a comfortably snug fit, like a nice hug. We strongly recommend putting ThunderShirt on for the first time when your dog or cat is calm. This makes it much easier to confirm you can get the proper fit and snugness. Available Sizes: XX-Small, Under 7lbs X-Small , 8-14 lbsSmall, 15-25 lbsMedium, 26-40 lbsLarge, 41-64 lbsX-Large, 65-110 lbs ThunderShirt Insanely Calm, Dog Anxiety Shirt Size: Medium