CR (Chloroprene Rubber) ua npuas ncauj, ib qho ntawm cov roj hmab hluav taws kub retardant, vim tias nws muaj cov tshuaj chlorine, nws tus kheej muaj cov nplaim hluav taws kub hnyiab thiab ua haujlwm tsis zoo. ua sponge khoom.