They are light, loose, almost like wearing nothing, and they usually dry between jobs, as opposed to cotton, which is heavy, and sops up sweat like a sponge, making you (me) look like a nasty, smelly, pig. The poly shirts are a terrible choice for anyone who does hardcore, dirty work though, as they won't hold up to that sort of abuse. I work solo - I walk behind a mower, run a trimmer along the edges, and blow off the driveway. They work for me. If I know I'm going to be doing labor intensive work, I wear something else that day.