Three layers provides support and comfort to neck or lumbar areaJelly roll design:    1. Inner high density foam cylinder core    2. Non-aqueous specialized visco-elastic gel layer surrounding core, reduces tissue interface pressure at critical points        • Proprietary gel is a flexible solid that will not leak    3. Surrounded by 1.5"; of visco-elastic memory foamCover features    • Fluid-proof stretch top cover, reduces shear/friction    • Antimicrobial    • Flame retardant    • Removable and washable•    End handle and convenient strap provide easy handling and positioning•    Warranty 18 months