Sitting for long periods of time on an unsuitable chair will almost inventively result in low back pain due to poor postural alignment. Our Harley Wedges will provide a pelvic tilt ensuring the hips are higher than the knees and taking the strain away from the low backAn ideal 8° angle ensures the natural 'S' shape of the spine is maintained. A base of high resilience foam bonded to a topping of visco elastic memory foam. Even weight distribution. Supremely comfortable – ideal if sitting for long periods .