HIGH QUALITY: Unlike a lot of cushions that use ineffective budget materials, orthopedic memory foam chair pads use thick, high density memory foam that can keep its shape, feel soft and comfortable.Since it's temperature sense memory foam, it's normal that cushions become harder in low temperature, cushion softness will be adjusted by user or environment temperature, thus it can give good support and perfects posture well..ERGONOMIC DESIGN: If you spend a lot of time driving and sitting, this seat cushion will gives you the support and relief you pains. Our car seat cushion is perfect for pain relief of sciatica, lower back pain, lumbar pain, Pelvic pressure and hip pain, lumbosacral spondylosis,sacrum sacroiliitis, prostate conditions etc..BREATHABLE HOLLOW: The office chair cushion with hollow design breathes well, It's the choice for people with hemorrhoids, prostatitis problem and pregnant women..UNIQUE TAILBONE PROTECTION: The seat cushion with heightened end,gently aligns the tailbone and distributes your weight evenly..WIDE RANGE APPLICATION: This seat pillow is suitable for computer chair, car seat, wheelchair, any home chair or seat on a bus, airplane or train. And it suitable for drivers, teachers, students, people in wheelchair, pregnant women, office workers etc.