Made from 5mm thick neoprene, Rehband’s RX knee sleeves deliver consistent support with a unique level of flexibility. This allows any athlete—from Crossfitters to Strongman competitors—to tear through a regimen without discomfort or a restriction of movement. Whether you’re dealing with regular knee pain, recovering from an injury, or looking to prevent one, Rehband Knee Supports supply joint compression and warmth to promote better blood flow and reduce the direct strain on the knees during squats, Oly lifts, etc. Keep the knee slightly bent (about 30 degrees) and measure the circumference (cm) around the leg, 10 cm below the patella Extra Small 31cm - 33cm Small 33cm - 35cm Medium 35cm - 37cm Large 37cm - 39cm Extra Large 39cm - 41cm