As the days get longer and the air gets warmer, it's time for most of us to rediscover what the outdoors are like — and remember what a joy it is to run and exercise outside. On these little adventures, this editor always wears a Nike Lightweight Dri-FIT Long-Sleeve Top ($25). They're fairly understated, extremely comfortable, and feature the Dri-FIT fabric that helps wick sweat away from your body — if you manage to run far enough that you need it, that is.