Class safety vests are for workers on jobs in heavier traffic where driver visibility is poor due to weather. A minimum 201 square inches of reflective tape 2 inches in diameter is required for a Class 2 safety vest. Reflective strips are over shoulders and round in the middle with horizontal stripes. Class 3 vests are for high traffic incidents and often first or emergency responders. When work is involved around traffic over 50 miles an hour, workers need a Class 3 safety vest with a minimum of 310 square inches of reflective tape that is 2 inches thick. Class 3 safety vests also provide more arm and leg visibility coverage. Know what class of safety clothing you need for work by checking our blog, ANSI 107 simplified.