Thank you for viewing. Purchased at Amazon at the end of last year, and stored at home with hardly any use. I'm putting it up for sale because I don't seem to have many opportunities to use it. Koshiretch is a compact acupressure device that loosens the muscles around the "sacrum," the center of the pelvis, and corrects misalignments. By lying on your back and placing it under your buttocks, and gently swaying from side to side for about 30 seconds, you can care for the sacroiliac joint and lumbosacral joint, and expect to lighten and refresh your lower back. ＜How to use＞ - Lie on your back and bend your knees. - Place Koshiretch on the center of your buttocks (sacrum). - Gently sway from side to side for about 30 seconds to stimulate the muscles. ● Material: Body: ABS resin, polyurethane Body cover: 100% polyester ● Product size: W15.5 x D12 x H7cm ● Weight: 139g ● Color: Red This heart-shaped red cushion uses breathable mesh fabric and is ideal for posture correction. - Brand: PROIDEA - Color: Red - Shape: Heart-shaped - Material: Mesh fabric Thank you for viewing.