This jacket has the look of a classic fleece but is merino wool, like the rest of the Icebreaker range. Result: it keeps you warm even when wet (sweat or rain), in contrast to the "wool" polar petroleum based. Moreover, no smell unlike synthetic materials. The cut is very good, the jacket is discreet enough to be worn in the city and the various handy pockets. The only catch: if strong wind, the air we feel go but it is not fatal. A simple waterproof windproof layer and voila! Purchase highly recommended!