I have the Bella tech long sleeve from 3 years ago, and am once again happy with a mons royale piece. This is thicker (and I’m assuming warmer) and fits smaller. It looks as pictured, quite tight and works well as an under layer. I’m normally an XS in shirts, a size 4 in lululemon, 5ft 1in 110 lbs. I wear these in the hockey arena as well as hiking.
This top is everything that I was looking for! Merino is a good winter weight, love the print and colour, stretch and sizing is spot on. Went for a small and thought it might be too tight but it's perfect.