Leg Spacer - Helps align the spine & eases back tension Convenient and comfortable positioning aid that encourages the natural alignment of the pelvis and spine when resting or sleeping. Inhibits spinal twisting during sleep, encourages better circulation. Ideal for those recovering from hip surgery. Strap adjustment helps secure Leg Spacer for a custom fit. In pressure-diffusing Memory foam covered in moisture-resistant (hospital grade) Steri-Plus cover. Helps align the spine helps alleviate tension to the back. Therapeutically designed to help relieve pressure and strain on the lower back, hips and knees while you sleep by helping keep your legs aligned with your spine.