allow me to reccomend campmor's trail mail for winter riding clothing bargains and the performance duofold t-rides cool but stopped at 120 degree surface temp-the torso is cooler than bare arms in the sunlight!
the hot weather t does not protect from salt water marsh mosquitoes.
testing the varitec dufold T's available from Campmor- 90-100 degrees ( ina 15-20 mph breeze off course!! wondering about pedestrian health/) cool enough. no prostration in sight! then thunderstorms in fro the gulf of m soaked and cooling. in cotton thie cooling is uncomfortable, the range from the 90 to the thunderwater without insolation is cold!! the varitec? the torso stays warm. the shirt dries quickly. the body slowly goes back and forth hot-cold-hot pleasantly. no problem. extremes? huddling under a wal mart paint tarp $1 while big thunder squalls thru in a wet varitec long sleeve over top a short sleever gives a warm coat effect while soaked. really plush upscale comfy. and rememember to find nylon pants for the pack