Assist in Back Pain & Sciatica Relief - Ergonomically designed, provides support and comfort while reducing pressure on the tailbone with the U-shaped cut out for healthy posture. Supports recovery from lower back problems, helps with most sitting pain due to sciatica, herniated discs, tailbone injuries, pregnancy, hip pain and hemorrhoids. Our seat cushion is designed to help relieve pain while sitting however it may not work for all conditions or completely eliminate all pain symptoms | All-in-one High Density Memory Foam Cushion - ComfiLife's all-in-one features are unrivaled: Non-slip rubber bottom, built-in handle for easy transport and machine-washable zippered velour cover for easy cleaning. Made with quality memory foam. Product Dimensions: 17.5 x 13.7 x 2.8 inches | For Office Chair, Driving and Traveling - Provides comfort on most hard surfaces; office chair, desk chair, kitchen, car seat, airplane, rocking chairs and wheelchairs, office use, truck drivers, frequent travelers, sporting events and pregnancy. ComfiLife Seat Cushion may not fit perfectly some contoured car seats and large chairs. ComfiLife Coccyx Cushion will provide less support with increasing weight. For optimal support recommended weight is up to 225 lbs