Size wise, these ran small for me in relation to the size guide, which seemed kinda mailed in and not specific to this item online. Unlike a jersey, I rarely complain about warmth on my legs, granted I live in So Cal. I always hate how leg warmers ride down your legs or just feel clumsy. This is the perfect bit of kit for January-April in LA.

Fit was solid, a lot of breathability (is that a word) in the chest, but arms are insulated. Works perfectly in concert with the Specialized Gilet vest they sell. This keeps the arm nice and warm, but you will get wind to the chest. Like anything, it's a nice layer once you know how to layer it. I like this jersey for rides when I start in the morning and end in the afternoon once it's warmed up. I can ride early with the Gilet, then ditch that, it breaths great once things warm up.

Nice feeling and long-lasting material. Side zipper pocket has been key!

Good fit

Perfect fit and even better thermal protection for Northwest winter conditions. Also, materials and design are top notch!