Elviros Adjustable Firmness Cervical Pillow, Ergonomic Orthopedic Neck Support Pillow For Side, Back And Stomach SleepersSPECIFICATIONS Brand Name: Elviros Filling: Memory Foam Material: 100% Polyester Origin: Mainland China CN: Zhejiang Use: BODY Use: Travel Use: Massage Use: Bedding Choice: yes ADJUSTABLE SOFTNESS FIRMNESS: This cervical pillow is designed with two replaceable memory foam inserts (about 1. 18" thick). If you are used to sleeping on soft pillow,use the blue insert to fit the pillow, and the other yellow insert is more suitable for people who sleep on