This jacket blocks the wind very well and keeps my chest and arms warm while still venting heat and sweat sufficiently. I wear a merino wool base layer and the combo is very good from upper 30s to upper 40s. I don't ride when it's much colder. The size chart is fairly accurate. This jacket runs small. I am 5'5' 149 lbs 40 chest, 30 waist and the large fit just right over my base layer - snug but not too tight with sleeves just an inch longer than I like but body just right.
Jacket fits comfortably and is great for cold rides
