The DonJoy Hinged Knee designed for mild to moderate medial lateral control is available in both Neoprene and Drytex materials. The neoprene hinged knee sleeve has a more compressive and warmth capabilities than Drytex * The Drytex material is an alternative to Neoprene and constructed of a unique nylon core and polyester Lycra fabric that allows for improved airflow * This fabric provides compression and support yet allows for breathability * Ideal for patients who have allergies or irritations to Neoprene or live in warm weather climates * The following circumference measurements should be taken at knee center 6 above knee center and 6 below knee center * Thigh: 21 - 23� Knee Center: 15 - 17 Calf: 16 - 18 *