agree with flat footed, you are better off with something that is windproof, as you will be wet, either with rain or sweat, and you need to keep warm, something that stops the wind chilling you is better
also - I have found different makes have very different fittings, for example, when I tried on some adidas stuff there really wasn't room for my boobs in there, though nike I havev always found to be a better fit, but depends on the shape of your body