Think comfort. Shorts, tee shirts, whatever you feel you can move in. You want clothes that don't chafe your skin.

Try material such as CoolMax. This keeps you cool and dry.

Wear the right shoes for your activity. For weight training and low impact activities consider a cross-training shoe or a walking shoe. If you're going to be running, you'll want a running shoe so your feet will have plenty of support.

Similarly, if you're participating in a sport such as basketball, football, etc. you'll want a sport-specific shoe so you don't hurt yourself.

Make sure you can be seen easily if out at night, have reflective material on them. Be picky about your workout socks.

If they're too thick or thin you could get blisters, which can ruin a good workout.

There is no exact with this - as long as you are comfortable and safe.