Bedgear's High-Low Preformance Pillow Collection features a HIGH pillow for back and side sleepers and medium-to-large frames; LOW Pillow for stomach and back sleepers, and small to medium frames. Each pillow features Patented Air-X® ventilated side panels for enhanced airflow throughout the pillow, moving excess heat away from your head, neck and shoulders, helping you sleep cooler. The single-chamber construction features a Hyper-Cotton™ cover and filled with a proprietary blend of silk-like fibers for comfort.