Health and safety forum

If you really want to treat your clothing with the stuff, best to bring your own. And it will probably wear off in 2 weeks, not 6.

You probably won't need it. Wherever mosquitoes are a problem you can be pretty sure that guest houses will have nets for the beds and/or screened windows. Take the usual precautions like keeping yourselves covered during the early hours of the morning and at sundown, wear a DEET repellent, burn a coil or two in your room before going to bed, etc.

I won't say that wearing pyrethroid-impregnated clothing is overkill, but unless you're going to be sleeping next to rice paddies or swamps or riverbanks, you'll probably find that lugging bottles of the stuff around wasn't really necessary. And if you're not comfortable with that, you can always mail your bottles of repellent to the Post Restante department of the General Post Office in the place where you're going to be first. Kind of old school, but it's a system that still works to the best of my knowledge.