Polycarbonate Hollow daim ntawv muaj cov rwb thaiv tsev ua haujlwm zoo heev, txo qis qhov kub hauv tsev thiab kev siv zog. Nrog rau huab cua muaj zog tiv thaiv thiab kev ua haujlwm ntev, nws yog qhov kev xaiv zoo tshaj plaws rau kev txuag hluav taws xob thiab kev tiv thaiv ib puag ncig.