NOSSSA / SSA APRON 4H 33" X 40" ONE SIZE FITS North Silver Shield®/4H® Aprons Permeation tested against more than 280 chemicals and chemical mixtures. The 2.7 mil lightweight 5-layer PE and EVOH laminate of the North Apron demonstrated superior chemical resistance against splashes and spills. Does not contain chemical accelerators that cause allergic reaction. Large aron can be easily adjusted using the attached ties. One size fits all. Sold individually.