For the price, I may buy another! I love the color and fit (6'2" 195 lbs=XL). It is thinner than other jerseys labeled "thermal" but it is warm. Low 50s and below, I wear an undershirt, Low 40s also a light jacket and I'm good for 4-5 hours.
This jersey seemed small at first, but is just right. I'm 6'2'+ 195 lbs. and the XL is the right size for all Sportful gear. This isn't a super thick jersey, but with a base layer and a thermal long sleeve, it's plenty warm down to lower 40s. A light jacket over the top gets me to low 30s just fine.