Tricot polyester interlock 131/134 - CSA Z96-15 Class 2 Level 2 and ANSI/ISEA 107-15 Class 2 Type P and R 135/134N - CSA Z96-15 Class 1 Level 2 and ANSI/ISEA 107-15 Class 1 Type O StarTech™ reflective tape ID pocket with pen holders 3 storage pockets Cell phone pocket 2 radiophone clip straps Adjustable 1 size up at sides Sizes S/M, L/XL, 2/3XL, 4/5XL