Anything that touches my skin in "those" places - one time use, then wash. Socks, undies, bike shorts, jerseys, T-shirts - especially during summer.

Middle layers: Sweaters, cargo shorts, fleece sweat pants - every two or three wearings, depending on how much I sweat in them.

Outer layers: Rain jacket/pants, wind breakers, vests, gloves, hats, etc...when they start to get ripe.

I use Sport Wash on all of my tech clothing and wash them one cycle more than delicate in a front loader. Most get tossed in the dryer. Some get hung up to dry - mostly based on which ones are allergic to Velcro.