I'm going to be going on a trip to hot Thailand soon, and want to bring a few ultra thin merino wool shirts with me. I know wearing black when its hot and sunny can be pretty brutal, so wearing white shirts is quite mandatory. I would just buy a merino wool shirt in Thailand, but I'm fairly certain I can't just buy a shirt my size without a lot of work.
Thing is that it's fairly hard to find a white merino wool shirt that is locally available, and the lightest color I've been able to find is a grey colored shirt. I can't really test if a grey shirt will boil me up while I'm in cold Canada, so do you guys think it will work in Thailand?
The shirt in question





