Memory Foam Seat Cushion for Office Chair - Firm Coccyx, Tailbone, Sciatica Pain Relief - Breathable Mesh Cover & Non-slip Grip Bottom- Ergonomic Design by Arvada & Co - Black REDUCES LOWER BACK & COCCYX PAIN - The ergonomic tailbone cutout design relieves pressure from sitting at your desk all day. The extra support from this cushion also promotes better overall posture to reduce lower back & Sciatica pain. FIRM MEMORY FOAM PROVIDES MORE SUPPORT THAN OTHER SEAT CUSHIONS BREATHABLE MESH COVER KEEPS YOU COOL - the mesh cover keeps you cool and dry over extended periods of use. Other cushion fabrics, such as velour, become hot and sticky making it uncomfortable & unsanitary after even a short period of time. But you're in luck because that won't happen with this amazing mesh cover! The convenient zipper makes it easy to remove the cover & it is even machine washable! NON-SLIP GRIP BOTTOM - our advanced micro-grip design ensures your seat cushion stays comfortably on your chair. Grips tight even on slick chair surfaces such as wood or plastic. SATISFACTION GUARANTEED! 100 DAY NO HASSEL MONEY BACK/REPLACEMENT! PERFECT FOR OFFICE CHAIR, COMPUTER CHAIR, CAR, AIRPLANE, WHEELCHAIR, BUS, SCOOTER, OR ANYWHERE ELSE THAT YOU SIT FOR EXTENDED PERIODS OF TIME