My intention was to use this with layer options. The sleeves had generous length however just to tight around the forearm area. I would normally wear a large being 6' 175lbs. I ordered a XL. Wore this over a marmot variant jacket medium size and my arms were tight. The rest of the jacket fit great. I was bummed.
This review was written in the old system and had content requirements that are different than reviews written today.