If cotton is no longer your bag for outdoor activities you may want to pick up a Mountain Hardwear Women's Wicked Tee. With its long-cut back, this tee is equally comfortable at the crag or on the bike. It even offers UV protection from those meddling rays. Quick to dry and born to wick, this tee is wicked awesome.
Bottom Line: Crack that wick. The Mountain Hardwear Wicket Tee wicks it, wicks it good.
I bought 3 of these for a recent warm-weather vacation. Unlike any cotton or cotton-blend tee, these really do make you feel dryer and cooler. They come in attractive colors, pack small, weigh nothing, and dry very fast (you should hang them to dry to preserve their wickability). These are very form-fitting, so buy one size larger than normal if you don't want to look like an outdoorsy vixen!
These t-shirts are wonderful! They’re very lightweight, dried quickly and were really comfortable. I would highly recommend them to anyone going on a backpacking/camping trip - they pack small. They wash beautifully in the machine on cold - but be sure NOT to use any kind of fabric softener and do NOT throw them in the dryer - it will influence their wicking ability.