TULSA, Oklahoma - It's been a hot summer so far, and it's not over yet. For those who work out in the heat every day with no air conditioning, it can't be over soon enough.

Well, in the meantime, one Tulsa businessman has figured out a solution: kilts.

O'Brien Auto Performance has Irish jig music playing in the shop and a shamrock in the company's logo, but the Irish theme doesn't stop there.

About four years ago David O'Brien decided he's worked his last day in the summer heat in long pants.

"This is physically cooler than shorts," O'Brien said.

David said wearing a kilt working on and under cars requires a certain kilt etiquette.

"Keep your knees down and your feet crossed, then everybody's happy and safe," O'Brien said.

He said they also need to be mindful of leather interiors on 100-degree days.

O'Brien's not the only kilt-wearer in the shop. David Denney, whose nickname is "Dinkum," has joined in, too. But not Ryan Henry--his legs are apparently his own business.

The kilts they both wear every day from May to October are made by an Oklahoma City company called Kommando Kilts.