Work tough with FLEX Regular Fit Straight Leg Tough Max™ Duck 5-Pocket Pants. The Tough Max™ technology adds ring spun fabrics for extra strength and comfort. Flex fabrics are a must and are two times stronger and longer lasting than all-cotton fabrics. That means it provides excellent abrasion resistance and enhanced durability. This performance stretch pant will help enhance your mobility to help you get the job done.