William P.wrote a review of Castelli Wind Base Layer Long Sleeve Top on September 30, 2013
Familiarity: I've used it once or twice and have initial impressions
really nice, but this runs really small. I can get away with a castelli small for base layers, vests and light jackets, but wear medium for jerseys and bibs. this in small is basically impossible for me to get on/off.
once its on, its amazing. but it aint easy.