The Pro Aero II jersey has been my go-to race fit jersey for the last 5 years. The material is great for 3 seasons, holds up well to abuse, and the sleeve length gives me more protection from the sun/wind/etc. The powerband on the sleeves keeps them in place while not being restrictive, and they anchor arm warmers and sun sleeves as an added bonus! I am 5’6” with a slender athletic build and the medium is snug without being tight, has a perfect length, and the collar doesn’t bind when the jersey is fully zipped. The olive color is really pleasant:)