Rickwrote a review of Craft Active Intensity Crew Neck Top - Men's on September 13, 2019
Familiarity: I've used it once or twice and have initial impressions
It has been too warm in SoCal to wear this yet, but I can't wait. It fits like a glove, but it is not too tight.
With other brands of base layers or jerseys, I have to order a large or XL. I have an older Craft mesh sleeveless in medium and I was hoping the fit was similar. This medium fits me too. The sleeves are long enough that you can pinch them with a finger at your wrist to hold them in place as you slide into a long sleeve jersey without the forearms arms bunching up.
I may think about using it for skiing or cold running days too.