The stretchy strap material is made of silky fabric, which is sturdy, and does not hurt or burn your skin with friction. The folds of fabric are upgraded wide supportive and do not “cut ‘’ into you compared to the traditional narrow strap. A yoga sling is certainly a good way to take yoga to a higher fitness level. The sash is adjustable for different lengths/stretches, you can adjust it right according to the number on each side. The adjustable swing length is 63". The waist /leg strap is a great alternative to yoga balls.