Flippable Armrests: The armrests of this chair are reversible and can be adjusted from 90° to 180°. This design ensures that you have plenty of legroom when sitting cross-legged and can accommodate a wide range of body shapes. To adjust, the armrests need to be wrenched inward toward the seat before they can be flipped outward. Reliable Materials: Our computer chairs feature a heavy-duty BIFIMA-approved metal base which can hold up to 264 lbs. SGS-certified class 3 gas cylinder ensures that the seat's height adjustment range is 3 inches, which makes it very easy to adjust to your optimal position. 5 silent 360° swivel casters for smooth movement that won't damage the flooring. Versatile Adjustability: This big office chair has a 360° swivel seat, a 20.2-23.2" seat height adjustment, and a 135° reclining adjustable backrest design that allows you to adjust it to your needs. Whether it's office mode or nap mode, it will meet your needs for personalized comfort. Com