columbia omni-dry short and long sleeve T's are the best i've tried. playing in 95 degree, heat i could not wring any sweat out of the shirt. i always wear long sleeves, which seems to keep me cooler in direct sun and wear white or light grey colors. don't know if they still make them, but i've found them @ marshalls, ross, etc. the nike drifit T"s made for runners are extremely light and comfortable and also dry very quickly.