The Mini Ztek has all the great features of Ztek in a design better suited for slimmer facial sizes. It has an integrated nose piece, and its soft, non-slip rubber temple tips provide non-binding fit with an economical wrap-around single lens that provides full panoramic view. The scratch resistant polycarbonate lens provides 99% UVA/B/C protection. This combo comes with contoured fit disposable polyurethane ear plugs that gently expands and self-adjusts to all size ear canals. they are rated at a NRR 31db.