The bristles arefine bent wires designed to penetratedeep into the coat and are really able to groom the undercoat well without scratching your pets skin! Regular brushing and massaging can help improve blood circulation and relaxes your pets. EASY TO CLEAN: When youre done brushing your pet, simply click the button and the bristles retract back into the brush, Making it SUPER SIMPLE to remove all the hair from the brush, So its ready forits next use. SAFE AND DURABLE MATERIAL: