I had a chat with a guy from Halvarssons the other day and about "breathable" materials like Gortex and how they can work against you if you don't use them in the right way.
1. Base layer
2. Heat
1. If you wear a cotton base layer, you have already lost. It will absorb and trap moisture against you, making you wet and cold and stopping the breathable stuff from doing its job. Wear wool or man-made fibres.
![slap.gif slap.gif]](./images/smilies/slap.gif)
(cotton is great under a mesh jacket for staying cool on hot days though)
Wearing too many clothes can be a problem too, if the inside of your jacket is well insulated from your body and doesn't get warm the membrane might transmit moisture from the outside to the inside

2. This heat business is important because the membrane tries to send moisture from the humid side to the less humid side. If it is wet and you turn on your (posh bike's) heated grips and/or seat the membrane starts to work in reverse. The warm, wet "armpit" atmosphere is now on the outside and it sends moisture to the cooler less humid inside

So I'm still cold wet and miserable but at least now I know why
