Part of being a pro is being able to make constant adjustments on the jobsite. Unless it’s your underwear that needs constant adjusting—then it’s just annoying. 
The WMBS1 is a tough boxer shorts made to flex and move in all the ways you need, and none of the ways you don’t. 
The four-way stretch fabric is designed to fit snug, so you don’t have to worry about your underwear riding up under your pants. Plus, they feature an anti-microbial treatment and fly opening for ease of use.