【Sanitary Packed】: Each head equipped with dust cover then sealed into plastic bag and together packed in . Three layers of protection avoid dust pollution during packing and transportation. 【Teeth Protection】: 95%-98% top of bristle rounded before packaging. Just considering protecting your teeth when brushing in high vibration. The teeth enamel would worn if bristle was not rounded. 【Specially Designed】:This head is specially designed , Better matching and more thorough cleaning. It was made with the best quality material. High density, soft and end-rounded bristle with can perfectly protect the teeth. 【High cost performance】: A of 5 pieces can meet your need to change your toothbrush, and the price is more appropriate. 【"w" Shape Bristle】: Shape of bristle is designed in "W" shape thus the head can fit to your teeth well. 【Sanitary Packed】: Each head equipped with dust cover then sealed into plastic bag and together packed in . Three layers of protection avoid dust pollution during packing and transportation. 【Teeth Protection】: 95%-98% top of bristle rounded before packaging. Just considering protecting your teeth when brushing in high vibration. The teeth enamel would worn if bristle was not rounded. 【Specially Designed】:This head is specially designed , Better matching and more thorough cleaning. It was made with the best quality material. High density, soft and end-rounded bristle with can perfectly protect the teeth. 【High cost performance】: A of 5 pieces can meet your need to change your toothbrush, and the price is more appropriate. 【"w" Shape Bristle】: Shape of bristle is designed in "W" shape thus the head can fit to your teeth well.