Features: The specialized pillowcase is woven from mid-molecular cooling fabric that provides an instant and continuous cool-to-the-touch sensation. The round bolster design fills the gap between your neck and the mattress, promoting natural spinal alignment and relieving pain. Ideal as a neck pillow, lumbar support, leg spacer, or under-knee bolster to alleviate pressure points across your entire body. Made with firm, responsive memory foam that fits to your body for customized support without flattening over time. Specifications: Material: high-density memory foam, mid-molecular cooling fabric cover Main Color: white Size: about 18 x 4 inches/ 45.72 x 10.16 cm Package includes: 2 x Neck pillows for sleeping Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays.