FSE Ergonomic Gel Chair Cushion / Coccyx Cushion delivers supreme comfort and support to help ensure long hours of pain-free work at your desk.Before designing this premium-quality gel seat cushion we took a good look at common consumer complaints of leading competitors. Among them were insufficient size flimsy and unsupportive padding square shapes that cause discomfort and circulation problems in the lower legs and unpleasant odors common to plastic and rubber.WeΓÇÖve addressed these issues with ergonomic contours and a supportive odor-free TPE gel core. Then we upped the ante with a coccyx cutout a ΓÇ£waterfall front inch to relieve pressure behind the knees a honeycomb cell structure for cooling airflow and a breathable removable mesh cover that washable.The result is a plush cushion that will make any office chair feel luxurious.