The Zero Degree Knee is a foam pillow that creates optimal knee extension for Total Knee Replacement recovery<br> Designed by a team of board certified orthopedic surgeons to ensure the precise angles for proper rehab<br> Made in the USA <br> Keeps the toes pointed toward the ceiling in a neutral position <br> Prevents internal and external rotation of the foot that consistently allows for full extension of the knee. <br> Durable foam that will last for many years. <br> Universal use with right and left extremities.