Products Advantage: Ergonomically designed, provides support and comfort while reducing pressure on the coccyx / tailbone with the U-shaped cut out and promotes healthy posture. Supports recovery from lower back problems, helps with most sitting pain due to sciatica, herniated discs, tailbone injuries, pregnancy back pain, hip pain, hemorrhoids and other spinal issues Provides comfort on most hard surfaces; office chair, desk chair, kitchen, car seat, airplane, rocking chairs and wheelchairs. Great for office use, truck drivers, frequent travelers, sporting events and pregnancy.