Medline Knee-High Anti-Embolism Stockings are a tailored, contoured fit with just the right amount of gradient pressure. Pressure is greatest at the ankle and gradually reduces throughout length of the leg (15-18 mmHg). Made of 80% nylon and 20% spandex. Color-coded toe and top band to denote size and length; toe color indicates calf circumference and top color indicates leg length. Measuring tape included in each bag.