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Waist cushion is designed according to the S curve of spine. It is only a quarter size of a normal seat. It can provide legs with a fists’ blood circulation area. Its curve can fit the S shape of spine and support waist effectively. It can maintain lumber spine’s physical health, and balance the pressure between lumber spine and muscles around it. It can also relieve fatigue, increase comfortable sensation, prevent spine’s discomfort from happening and solve its problems. And it is also anti-bacteria and anti-dust mite, comfortably breathable, helpfully healthy to our spines.