A new twist to Sullivans popular Smart Sensation Brush. Delivers even more stimulation to skin and adds body to hair coat, making it a hair growth must-have. With 302 precisely placed ball point teeth, no hair will be left clinging to hide. Best for dull, lifeless hair that still needs volume due to lack of base coat Contains 134% more teeth than the Smart Sensation. Teeth are narrower and more flexible to allow hair and skin to be stimulated with an even gentler massage. Rounded curvature to brush encourages more fluid rhythm to hair working process, while Sullivans new texturized grip enhances users comfort. Like Smart Sensation, the Curve is healthy for hide and hair. By providing a gentle massage to hide, it stimulates blood flow that releases natural oils from skin to coat the hair and promote healthy hair growth.