One version of the reflective safety vest is the surveyor's vest. These traffic safety vests commonly have a zippered front closure and may be available in a solid material, such as cotton or a mesh fabric. Higher traffic areas call for class 2 or class 3 versions of the traffic safety vests. Class 2 and class 3 traffic safety vests are suitable for high traffic areas where speeds exceed 55 miles per hour. Class 2 and Class 3 safety vests must meet minimum standards for square inches of material, so extras, like outside pockets, are sometimes not an option. Class 3 traffic safety vests carry more square inches of material than Class 2 vests. However, you can still get away with imprinting logos on most Class 2 and Class 3 vests.