Used this @ J. Tree when the weather was in the mid 40's to low 50's. It kept me warm but not too warm while climbing under those conditions while just wearing a base layer underneath. It's stretches easily while reaching for those far away holds. It's not designed for wet weather. It's also perfect as a 2nd insulating layer underneath a belay jacket. I wore the large size on a 5.8 170 lb broad shoulder frame that was the perfect size for me.
This review was written in the old system and had content requirements that are different than reviews written today.