Memory Foam Knee Separator Pillow Relieves Pressure, Strain & Pain for Better Posture, Positioning, Helps Lower Back, Knees & Joints Helps relieve pressure and strain on the lower back, knees and joints Contoured hourglass shape to promote proper spine alignment Soft terry cloth cover with adjustable Velcro strap to secure on leg 100% visco-elastic memory foam Size: 9" x 7.5 " x 5"