Super comfy and toasty! It's basically a vest with fleece arms and a hood. The vest itself has light polyfill insulation and is really warm. I felt myself heat up as soon as I put it on. The arms and hood are double layer fleece material (again, toasty warmth).
I was impressed by the quality when I got it in the mail. It seems like it should cost more $$, really a good deal at 65 bucks. Snaps only down the front, no zipper. It fits true to size. I'm 6 feet and 160 lbs-- could have gotten the Large but got the roomy XL instead for layering underneath. Fits like a champ.