-The technology used to manufacture racing chairs Seat height and back can be adjusted from multiple angles and in all directions. An additional thick neck pillow and waist pad provide comfortable support. -Using shapes with a high density Rocking chair function (inbuilt reclining function) -setting injection latex sponge Enhanced 4D hand rest design with multi-angle adjustment; multifunctional mechanical chassis; resistance adjustment function -SGS quality certification Class 4 air rod - Metal frame design: can strengthen load bearing - Extend the five-star chair legs: improve overall balance Constructed from incredibly breathable imitation leather