Designator for Polyurethane Shielding Neoprene CSM ‘USY’ Designator for Polyurethane Shielding Neoprene Polyurethane ‘USU’ Highly Recommended when Protection Against Ionizing Raditation is Needed High Resistance to UV Rays/Ozone Natural Aging Very Resistant to Reducing Acids High Temperature Limit: 160F Shelf Life: 3 years