Premier PlaySafe Daycare Safety Dog Collar, Medium 3/4-Inch This collar is designed to provide both the ability to instantly control and/or restrain your dog, as well as an emergency safety release Velcro holds tight until you release it by hand Tabs allow you to quickly find release Unlike quick release buckles which jam with increased tension, Velcro allows an instant release if dogs become entangled Can open from either side in an emergency