I recently bought a marmot ion wind shirt. Supposedly made of Pertex quantum fabric. I have used it in temp ranges of 59 f down to 35 f today. I go for a 30min walk at lunch every day at a pace of 4-5 mph. It gets me outside and gets the blood pumpin. Well, I have not been impressed with the wind shirts ability to regulate moisture. I have worn a techwick shirt from ems and sometimes a light 200 fleece vest under it. It has kept me warm with the activity level. but when I get back to the office it is coated with water droplets on the inside. Is this because of the temp? I'm not getting the breathability I expected. I read that Ryan washed the trap out of his windshirt to make it more breathable. Should I do the same? I can't imagine wearing this with a pack on, I would be drenched. My first winter BP trip is in 2 weeks, does anyone have any suggestions.