Tri-Core Ultimate 4-Zone Cervical PillowBack & Side Sleeping Very Firm 26" x 16" x 2. 5 4" (8" Head Cradle) Molded Foam Latex Free Non allergenic 10 Year Warranty This nonallergenic foam pillow provides proper alignment of the neck and supports the head while sleeping to help alleviate headaches and neck pain. It's backed by a 10 Year Warranty not to lose shape or resilience. The unique molded foam of the Tri Core Ultimate provides a firm foundation with a surface that is soft to the touch.