What is a zero-gravity chair? Instead of lying flat, zero-gravity chairs elevate your knees and legs while also angling your torso slightly up and back. This set of two bestselling zero-gravity chairs cost a mere $60 each, which is great value for your money. This zero-gravity chair is available in neutral taupe and pretty coral blue, along with basic black. With your legs resting in an elevated position above your heart, zero-gravity chairs improve circulation and reduce swelling.