2D vs 3D vs 4D Massage Chairs: A No-Hype Buying Guide Before You Spend $3,000
Massage chair marketing has a dimension problem. Walk into the category cold and you’ll meet 2D, 3D, 4D, even “5D” chairs — and every product page insists the higher number is the one you need. The truth is simpler and cheaper to act on: those numbers describe one specific thing (how the back rollers move), … Read the guide →
