The Therapeutica cervical neck support pillow was created by an ergonomic designer, along with a doctor of chiropractic, for those who sleep on their back or side. This nonallergenic foam pillow offers comfortable, yet firm, support to help restore the natural curve of the neck. The unique nontoxic, nonallergenic, molded foam design includes three distinct areas to help reduce neck pain and stiffness. The gentle incline of the wedge extension supports the upper spine, the firm, cervical contour supports the neck, and the contoured head rest, with airflow channels, helps keep the head level. Both outside edges of the pillow are designed for side sleeping. Our unique molded foam creates a firm foundation with a surface that is soft to the touch. This allows for a comfortable yet supportive night's sleep. Ordering the correct size Therapeutica Pillow is key to helping improve your sleeping posture. IMPORTANT: The product size for this item does not correlate with your clothing size. It may take some time to adjust to this cervical pillow and immediate overuse may increase neck pain. Those who slowly ease their way into orthopedic correction, by alternating between this pillow and their current pillow, achieve the best results. Each pillow comes with a machine washable, soft, fitted, zip-open cover that is easily removed for washing. For those who are newer to cervical support pillows, or prefer slightly softer foam, the Lite version may be a better option for you. The Lite version provides moderate to firm support, while the standard version provides very firm support.