Plastic material, black breathable mesh design, good ventilation, size can be adjusted, can be adjusted according to actual situation to the most appropriate size. Can be kept at home to stop his noisy neighbors to avoid unnecessary trouble, go to the ground to prevent him you eat dirt or shock to the "frail elderly" who is to help you correct bad habits of great assistance dog Tools! Use, only need to rush the short side, the back of the head with a belt around the dog's activities can be buttoned up.