InteVision Knee Pillow with, 400 Thread Count, 100% Egyptian Cotton Cover Two-layer-design: memory foam on top of a highly resilient base foam provides enhanced comfort while preventing the pillow being compressed into "flat". Includes a high quality, 400 thread count, 100% Egyptian cotton cover which can be removed for easy cleaning. Helps to keep your legs, hips, and spine parallel and aligned, relieving strains on those areas and promote circulation Every product comes with the trademark InteVision. Size: 12" x 7" x 8" GUARANTEE - If you are not 100% satisfied, just return it in 30 days for a full refund.