Class-1 safety vests by 2W International provide high visibility in low/slow traffic areas such as a warehouse or a parking lot.  These safety vests are made of 100% polyester therefore they won't shrink and clean easily.  They have pockets and a zippered front for convenience.  Anywhere traffic conditions are likely to be 25 mph or over, play it safe and look at the class-2 and class-3 safety vests in their respective categories.