Sim Khan, whose Brimble & Clark tailoring shop in Washington, D.C., specializes in trim suits, said that his business has lately seen a notable increase in interest from founders and executives in the defense technology space. He argued that slim suits that show clients' physiques can even be appealing to potential employers. His reasoning: "If you're this disciplined about your body, you're going to be this disciplined about the work you do for us. "Khan advertises his roughly $3,000 suits on burly veterans and athletes. One of his brand ambassadors who likes extra-slim suits is Rudy Reyes, a Recon Marine veteran, conservationist and TV presenter. The Rambo-ish Reyes, 54, boxes and flykicks in tailoring on Brimble & Clark's Instagram account. Reyes believes that most formalwear "tends to mute 'masculine and warrior' characteristics." He said he wants his suits snug enough to show the contours of his shoulders, waist and legs. "I don't want to cover this machine," said Reyes, who often accessorizes his suits with assault rifles on Instagram, where he has more than 230,000 followers. "When you see me walking down the street, you know that I'm formidable, and I can be an asset if you need me," he added. He finds baggy clothes sloppy and unserious, and cited a special-forces motto that's usually applied to combat equipment but, he said, works just as well for suits: "Tight is right and loose is no use. "In the corporate world, it can be tough for super muscular guys to look professional and not "like a dumb jock," said Wyatt Smith, an investment banker who runs the Instagram account @FitFinanceBro. Smith, 26, who's based on the West Coast and is also a weightlifter, said a lot of guys who bodybuild get suits that unnecessarily suffocate the arms, glutes and thighs. Instead, he opts to show his physique with a slim, stretchy jacket and tapered pants. If fitted but not tight, he said, "a suit will accent your physique much better than even a tank top."