1. Before buying, please refer to the size chart to buy. Breathable and comfortable: The soft mesh fabric will not hurt the dog's mouth, allowing him to breathe, drink, sleep and play normally. The mouth must be at least 6 cm 2. High quality breathable mesh, double adjustable mouth and neck width, thick, soft, firm, easy to wear. The mesh part is covered with PE to improve the toughness, but there is a little smell that will disappear after several times cleaning or airing. 3.Wide adjustment range, good air permeability, extra-wide double reinforcement belt, easy to wear and install, not suitable for falling 4. Use this product to effectively prevent bad habits such as barking, biting, picking and biting. Special reminder: especially suitable for dogs with long noses.