In reply to ylem:
Hi fella. I have a pair and really rate them.
1. I'm a 32 waist and 34 leg and medium fits me fine. I was worried that they'd be too short but they are perfect.
2. They are pretty windproof. No idea re wind speed but they are good for cold, windy mountain days (or as I'm increasingly finding, standing in the park pushing my kids on the swings in winter!) In sub-zero temps they are good if you're moving but you can wear long johns underneath if it's really cold.
3. Mine are non-membrane and breath beautifully.