I'm honestly surprised the USAF hadn't done that already. The USN has done that for decades.
taskandpurpose.com
The Air Force announced on Monday that airmen across the service are allowed to wear tactical operational camouflage pattern caps, which basically look like mil-spec baseball caps.
Previously, airmen wore such caps only while deployed to the U.S. Central Command area of responsibility, which includes the Middle East and Central Asia. But the new announcement permits caps across the service. However, airmen will have to buy their caps from third parties for now, since the Air Force is still working to acquire the caps so that they can be sold through the Army & Air Force Exchange Service.
“If you have a Tactical OCP Cap, as identified in the official Air Force guidance, you are authorized to wear immediately,” wrote Chief Master Sgt. of the Air Force JoAnne Bass in a Facebook post announcing the change on Monday.

Air Force authorizes camouflage baseball caps in uniform
Previously, airmen wore such caps only while deployed to the CENTCOM area, which includes the Middle East and Central Asia.
