Cooling Vest Workwear Cooling Technology Evaporative Cooling Cooling Time 2 hr. Workwear Material Properties None Workwear Closure Type Hook-and-Loop 4XL/5XL Polyester Dark Blue Fits Chest Size 51 in to 58 In. Length 26-1/2 In. Requires PCM Elements Standards ASTM F 1959/F 1959M-06ae1 EN 1149-3 EN 61482-1-2 EN ISO 13934-1 EN ISO 13937-2