Did a brisk 5K training run this AM, felt great at 8:05/mile pace.
Noob questions on the lined shorts:
Are these designed to reduce chafing?
The lined shorts reduce chafing, but the main advantage is that they wick away sweat. Cotton is gross because once it gets sweaty, it stays sweaty and tends to cling. This leads to chafing, and it also tends keeps you hot because its hard for sweat to evaporate when its trapped under a loaded-down cotton shirt. I can't remember the last time I ran in cotton of any kind, and there's no way I would wear cotton underwear.
I wear cotton boxer briefs under cotton mesh short and haven't had any problems yet, but I'm training for a marathon and my long has only been a 12 miler so far. If I haven't had a problem should I stick with what has been working?
Go ahead and make the switch. If you're training for anything more serious than your local 5K, there's no excuse for not having some decent running gear. Running shorts and technical shirts aren't particularly expensive. You don't have to buy Nike or UnderArmor to get good gear. Most of the stuff that I wear is from Road Runner Sports and it's fine (although their shorts seem to be sized too small).
Also, are these the really short shorts that some runners wear?
You can get lined shorts in a variety of inseams. All of my running shorts are 7"-9". I can't pull off the 3" inseam look.
What fabric are these made out of? What brands are recommended?
Not sure about the fabrics, but they contain no cotton. They're mostly polyester and other synthetics. Some use bamboo. If you go to any decent sporting goods store, they'll have a pretty good selection of moisture-wicking clothing. You'll want to try on shorts because different manufacturers size things a little differently, but for shirts, I have 6-8 variations of
this. Good luck, and trust me -- once you've worn tech gear, you'll never go back to cotton.