Tech-heavy apparel options like ultra-aggressive wicking technology, stretch fabrics, and the like are an exercising godsend, but if you're lucky enough to find yourself in a swampland-humid region like South Asia, all that rapidly-evaporating sweat can give off a wicked odor. So, while our typical stance is that cotton kills, consider these polos our warm-weather exception to the rule. The men's Offhand is comfortable 100-percent cotton, while the Vitaliti adds a small measure of polyester and spandex to give the shirt a bit of stretch. Either way, the polos' loose fit allows those rare breezes to reach your skin, those inevitable sweat marks blend in with the shirt's pattern, and the casual-yet-classy styling will let you slip from dingy pub to swank café with aplomb.
$48; www.patagonia.com