I would pack some quality t shirts and shorts, some of the stuff here is a bit average. I wear it around the house , but on nights out and on excursions I like to wear my clothes from oz
Shorts with secure pockets for phones and wallets are the go and so are shorts that are level with or below the knee if you need to enter govt buildings or temples. Only rice paddy farmers wear short shorts.
Leave the polyesters and synthetics in the wardrobe, they are like being wrapped in Glad Wrap when the humidity hits 90%
Short woollen or wool blend socks are best if you need to wear shoes.
You can get horribly sun burnt here, you will need a hat.