Shop Sharper Image Massager Seat Topper 4-Node Shiatsu with Heat and Vibration online at Macys.com. Sharper Image Shiatsu Massager Seat Topper with 4-Nodes, Heat, and Vibration is the perfect accessory to give you the comfort and relaxation you need while sitting down. With multiple heat settings, there is a heat level suitable for all shiatsu chair users!