>>1145389Your cotton clothing will get wet with sweat and won't dry. This makes you cold (cotton kills), will blister your feet and make your balls rub together (causes extremely painful rash) if you have big thighs.
If you are on the cheap, you should be able to pick up a polyester t-shirt and some underwear from your local Walmart or equivalent (nylon is better but more expensive). Wool socks are the best but anything non cotton should do the job. Light cotton pants are fine, no jeans though unless you live to suffer.