Premium Memory Foam with Cooling Gel Pad Top -- The inner core of BEAUTRIP office chair arm pads is made of 100 percent pure memory foam with moderate hardness which provides a cozy feeling with soft touch. The memory foam cushion includes a cooling gel insert on top to maximize comfort by keeping you cool and absorbing body heat to better adapt to your contours. Arc Contoured Design -- We designed BEAUTRIP gaming chair armrest pillow with an unique arc shape which is better adapt to your wrist, arm and elbow with extra support and comfort. The armrest pad acts as a riser for office chairs, gaming chair, desk chairs and wheelchairs by increasing the height of the chair arms. Breathable & Detachable Mesh Cover -- Along with the cooling gel pad, our armrest cushions come with breathable mesh covers to release heat. Velcro straps and non-slip particles at bottom enable the chair arm pads to be firmly installed on chairs. Hidden zipper makes mesh cover detachable for easy cleaning and machine washing. The padded armrest acts as office chair armrest covers, protecting your chair from wear and tear. Note: Do not put memory foam cushions in the washer or dryer. Thickening and Widening Design Fits a Variety of Chairs- BEAUTRIP armrest cushions measures 9.8 (L) x 4 (W) x 2.7 (H) inches and fits most chair arms between 3 to 6 inches in width. Ours chair armrest pads are thickenedly and widenedly designed with which you can get extra support and comfort. And the armrest pads fit a variety of office chairs, gaming chairs, dining chairs, reclining chairs and wheelchairs.