The Calming Face Wrap works on the same principle as the Anxiety Wrap, which is “maintained” pressure. A dog’s muzzle area is loaded with receptors and “maintained” pressure effects those receptors. Our patented Calming Face Wrap is comfortable with an easy clip release and adjustable. Coming in 6-sizes, select the correct size by your dog’s weight. Color Black Used to help ease barking, digging and scratching. Often used in conjunction with the Anxiety Wrap for even more anxiety relief.