Cov khau looj plab hlaub yog cov khoom siv tiv thaiv ko taw rau cov neeg tua hluav taws kom nkag mus rau qhov hluav taws kub. Cov khau looj plab hlaub yog embedded nrog steel phaj rau hauv qab. Lawv yog waterproof thiab puncture-proof. Lawv kuj muaj cov txheej txheem thermal rwb thaiv tsev thiab rwb thaiv tsev ua haujlwm. Cov ntaub ntawv tseem ceeb yog roj hmab thiab hlau.