Dr. Breus Silhouette Pillow Four way stretch 5oz lycra with flatlock seams 40+ UPF rating Patented, wave-shaped design provides enhanced support and proper alignment of head, neck and shoulders while sleeping on side Pillow can be easily rotated to deliver the same comfort and support while sleeping on back The pillow's quality materials, combined with its distinctive shape, provide pressure relief to allow for complete relaxation Side panel construction features innovative spacer knit fabric for enhanced air flow and comfort Ultra-Fresh treatment provides long-lasting protection from dust mites and allergens for a cleaner, healthier environment