Seettek LLC Ergoseet Therarapeutic Seat Cushion Patented ergoseet is 15 x 15-inches and 2-inch tall; with its revolutionary new dynamic contouring and compression resistant closed cell eva Waterproof material; hand-washable, dishwasher safe, removable microfiber cover is machine washable Reduce back pain; eliminates pelvic stress points with its revolutionary new dynamic contouring allowing unequalled support and weight distribution for back, hip and leg comfort Reduce back pain; eliminates pelvic stress points with its revolutionary new dynamic contouring allowing unequalled support and weight distribution for back, hip and leg comfort Revolutionary new technology; endorsed by international chiropractors association, independent marketing studies show 96.4% of participants rated ergoseet "extremely effective" New dynamic contouring and compression resistant closed cell EVA Removable microfiber cover is machine washable Reduces back pain Eliminates pelvic stress points