The Therm-A-Sleep Snow Pillow features a combination of cooling fabric and self-customizing memory foam fill for responsive support and comfort. Unique hybrid design combines low tension springs with supple memory foam designed for superior support, and to optimize neck and spinal alignment. Nordic Chill fiber provides a cool-to-the-touch feel, while transporting heat away from the sleeper 10x more quickly than cotton. Cooling effect works even through thick pillowcases. Added Tencel fibers are smooth for sensitive skin, and hypoallergenic, moisture-wicking, and inhibit bacteria growth. Multiple levels of firmness are perfect for side, back and stomach sleepers.