The corset belt is made of mesh nylon. The belt is breathable and flexible. The finger pull tab and pulley system along the spine provide for simple adjustment and even tension. The corset belt is ideal for added back support during long cases and can be worn under any of our aprons. *The corset belt is worn under the apron. We proudly stand behind our radiation safety aprons with a full guarantee on defects related to workmanship and materials for one year following the date of purchase. This warranty does not cover damage caused by abuse, neglect or use in non-medical/intended uses.