Case of 500. The Boxed 1 Mil Poly Apron is a waterproof apron which features heavyweight polyethylene construction. Being non-penetrable by fluids, these white aprons provide a tough protection from chemical spills in a non-toxic work place, and are acceptable for use in USDA inspected establishments. Accompanied with extra long ties, this full-size apron can be worn easily by users of all sizes while making adjustments according to their preferences. Perfect for use in food processing industry and clinical facilities, these Boxed 1 Mil Poly Aprons are a must-have to protect restaurant staff's clothing from spills and stains.