The utility model what provide it is a kind of can find ahead of time it is damaged, reduce disease and infect, prevent to reuse, improve the safety and sanitation set of user's safety. Its technological means includes: one with sealed end and open end, and is the elastic matrix of film shell-like； And one set O-ring at the what open end； Its characteristic is in what: the O-ring surface is equipped with a photochromic layer.本新型在於提供一種能提早發現破損、減少疾病傳染、杜絕重複使用，提高使用者安全性的安全衛生套。其技術手段包括：一具有密閉端及開口端，且為薄膜套狀的彈性基體；以及一設於該開口端處的O形環；其特徵在於：所述O形環表面設有一變色層。
