Davidwrote a review of Castelli Seamless Baselayer - Men's on May 5, 2018
Familiarity: I've used it once or twice and have initial impressions
Got a S/M (only size left) hoping it would fit. It did. Comes out of the box tiny but stretches a lot. It's tight but I liked that. Could feel it around the neck at first but then forgot all about it once riding. Giant red plastic Castelli badge front and center under collar is a bit annoying. Super meshy. Great for clubbing in Berlin. Not says 68-86 F range but I wore it riding a little hard under a light jersey in 70 F and I was getting too warm.