Buster Dog and Cat Collars Disposable, protective collars&mdash,an ideal and inexpensive solution. Made of lightweight flexible plastic, this collar will not annoy patient during rest since its flexibility will yield to the shape of the head. Endures pushing without getting deformed, even in cold weather. Collar is closed without use of difficult tapes and strings. Its size can be adjusted according to the size of the patient&rsquo,s head, and fastened to the patient&rsquo,s collar by the straps. Available in seven sizes with neck hole adjustments from 7 cm to 20 cm. Each collar has two to three possible adjustments. Each size sold in pack of 10 or a set of all seven sizes.