Having hiked in the jungles of Thailand, my experience has been a little different to others. As a matter of fact it started me on my lightweight crusade.
I had wet kit, and dry kit. I wore the wet kit all day. At night, in a hammock to be off the ground, I changed into dry kit. In the morning I got up, and put the cold wet kit back on. It did not stay cold for long.
As for sunblock, well I was in a jungle and not a lot of light gets in. Not that it is dark, just that your in the shade as the canopy blocks the sun.
This canopy also means it will be wet all the time. Even when it is not raining, it is raining as water drips off the canopy. Plus the fact that you are sweating all the time as well.
You need hydropel or a petro jelly of some kind for chaffing. Long sleeves and long pants for the bugs, plus a head net, plus DEET. Make sure your hammock is bug proof, as some mosquitos can drill through some materials.
Footwear and clothing needs to absorb as little moisture as possible and drain easily. If you kit is light enough, mesh trail shoes should be fine. Synthetics worked great for me, but your mileage may vary.
Rain gear, for me, was a waste of time. If you are not following a trail, then most stuff gets shredded. If you are, you just sweat in it anyway. As I said, I just had wet kit and dry kit.
Hope this gives you another other perspective.
For me, the jungle was an exciting place to be. Lots of wildlife, seeing wild elephants and the kind of hills they could climb just blew me away. I hope you enjoy you trip just half as much as I enjoyed my time in the jungles and you will have a great experience.