One interesting note - if you noticed, some of the airmen in my photos were wearing long sleeve fatigues. This might seem odd for troops working in the heat of SEA. However, for the bomber guys, it was a fact of life. Most of us were stationed in colder country so long sleeves were standard throughout the Air Force. When we deployed to SEA, we took what uniforms we had.
Although the US military had already approved a new light-weight fatigue uniform with short sleeves, they were only issued to folks stationed in SEA in the late sixties (as far as I know). However, we were allowed to roll our sleeves up above our elbows as long as they were even on both sides and didn't cover our rank.
In 1969, I was stationed at Takhli RTAFB in Thailand. We were issued the new fatigues and they were great. They were light weight and made of a loose weave so they were a lot cooler. They were also made of stronger material to resist rips and tears, and they dried quickly compared to our original fatigues that could take an hour or more to dry in the humid air.
Most guys shed their shirts anyway as soon as they got out to the aircraft, even with the newer fatigues.
Cheers,
Russ