Ultra-Cool 100% polyester mesh4-season adjustability for accurate sizing in any weather even over bulky coats5-point breakawayHook-and-loop front closureTwo 1″ wide high performance reflective material with 4.5″ contrasting colorLeft chest mic tabInside right chest 2-tier pencil/cell pocketTwo inside lower patch pocketOutside left chest 2-tier pencil pocketANSI/ISEA 107 2015 / ANSI/ISEA 107 2020 Type R | Class 2Fabric dye lot variances may occur and meet luminance factor as stated in the standard.