Simple Guide to 2D vs 3D vs 4D Massage Chairs
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2D massage chairs were the standard for many years and they still do a good job. People wanted a massage that could substitute their masseuse or spa service so 3D massage was invented to significantly improve the movement and quality of the massage. 4D evolved the massage quality even further by allowing your massage chair to focus on your tense muscles that most need soothing attention and care.

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