Ruwan tabarau na PC, ruwan tabarau na guduro na gabaɗaya kayan zafi ne, wato, albarkatun ƙasa ruwa ne, mai zafi don samar da ruwan tabarau masu ƙarfi. Hakanan ana kiran yanki na PC "yankin sarari", "yankin sarari", sunan sinadari shine kitsen polycarbonate, kayan thermoplastic ne. Wato, albarkatun ƙasa yana da ƙarfi, mai zafi bayan ya zama ruwan tabarau, don haka wannan ruwan tabarau zai yi zafi sosai bayan samfurin da aka gama zai zama mara kyau, bai dace da babban zafi da lokutan zafi ba.
Lens na PC yana da ƙarfi mai ƙarfi, ba karye ba (ana iya amfani da 2cm don gilashin hana harsashi), don haka ana kiransa ruwan tabarau mai aminci. Ƙayyadaddun nauyin nauyi shine kawai gram 2 a kowace centimita mai siffar sukari, yana mai da shi mafi ƙarancin abu a halin yanzu ana amfani da ruwan tabarau.