Our new aprons are made of environmentally friendly lead-free, non-toxic materials. They are 25% lighter and more flexible than conventional lead aprons, but have the same protective qualities! Flow No Lead aprons provide 0.25mm lead equivalency protection, have an easy-clean vinyl front and a tear-resistant cling back. For maximum coverage, order your apron with a sewn-on thyroid collar. Separate thyroid collars are available as well. Flow also carries the Uni-Hanger, which allows you to hang your apron on a hook or in a closet to prevent folds that can damage the lead lining.