Blue Jay Lumbar Support XL X Large 39.75 44 Blue Jay Shoulder Immobilizers Supports Durable flame retardant nylon upholstery resists Undercast Padding Durable flame retardant nylon upholstery resists mildew and bacteria The Drytex hinged knee suppoprt is a Neoprene alternative constructed of a unique nylon core and polyester Lycrar fabric that allows for improved airflow * Provides compression and support yet allows for breathability ideal in warm weather climates * Designed for mild to moderate medial lateral stability * Measurements taken 6 above mid patella knee joint line and 6 below mid patella circumference * Extra Small fits: Thigh: 13 15 injuries to the lumbar discs and the sacro illiac joint * 2 flexible internal stabilizers * Elastic side straps for custom compression * Breathable and moisture wicking * Color: beige 75 44 (when sizing measure around the middle of the waist) * Provides pain relief and compression for muscle injuries and general lower back dysfunctions