Application: Alleviates conditions of Iliotibial Band Syndrome.How It Works: This IT Band Wrap provides targeted compression, stabilizing the Iliotibial tract and it absorbs stress to the area and reduces friction and rubbing of the femoral condyle.Design Theory: The IT Band Wrap includes a compression pad which provides targeted compression. It is 2" wide and is made from UBL neoprene which is comfortable on the skin. Now with a NEW non-slip backing! Fit: Size Small fits legs with a circumference of up to 19" when measured 3" above the kneecap. Order the XL size if your leg measures larger.