Space Saving & Ergonomic: Office Chair slides under table when armrest is up, Armless model desk chair solves the problem of unintentional forward leaning when trying to get closer to the desk or computer screen, promoting correct posture. Soft & Wear Resistance Cushions: This office chair features thickened layers of natural sponge cushions , which makes office chairs soft and highly elastic, not easily collapse, and abrasion-resistant fabric wrapping can be used for a longer period of time.