The natural spine stretchSit on the style Keeper， the spine is clean. Beautifully around the waist line will. In wishing the beautiful waist line is recommended. Color: pink / black size: width 35 cm， height approx. 21.5 cm， thickness 1.8~2.5cm(forward-backward) * double-layer structure， which is approximately 1.3 cm thickness of layer thickness of layer is 1.2 cm.