Sullivan Sensation Curve Brush is a new twist on the popular SMART Sensation Brush, with even more stimulation to the skin and adds body to the hair coat. With the Sensation Curve’s 320 precisely placed ball point teeth, no hair will be left clinging to the hide. Best for dull, lifeless hair that still needs volume due to lack of base coat. The Sensation Curve contains 134% more teeth than the Sullivan Sensation, but the teeth are also narrower and more flexible to allow hair and skin to be stimulated with an even gentler massage. The Sensation Curve design also has a more rounded curvature to the brush, which encourages more fluid rhythm to the hair working process while the new texturized grip enhances the user’s comfort.By providing a gentle massage to the hide, it stimulates blood flow that releases natural oils from the skin to coat the hair and promote healthy hair growth.