Jeffrey Friedl 4 I'm 192cm with a thin, muscular build. XXL seems fine.Not waterproof, but good for reducing windchill on descents. Pocket on the back has two zippers, one for use while wearing the jacket, the other for use when turning the pocket inside out and using as a pouch to hold the rest of the jacket. Smart design. Small and light... I can literally shove the whole thing into a sunglasses case.