Hi-tech comfortable weave of cotton on the inside and polyester on the outside
6618/6619 - CSA Z96-15 Class 2 Level 2 (becomes Class 3 when worn with CSA Class 2 Level 2 top featuring reflective arm bands) and ANSI/ISEA 107-15 Class E Supplemental Type
6619BK - CSA Z96-15 Class 1 Level 2 (becomes Class 3 when worn with CSA Class 2 Level 2 top featuring reflective arm bands) and ANSI/ISEA 107-15 Class E Supplemental Type