I use this as a cold-weather base layer, piling on a short or long sleeve jersey on over it with a cycling jacket over that, layering as the temperature dictates. The size as is the case with everything Castelli: runs a couple sizes smaller than what I'm used to. The material is a mesh which is perfect for layering. It's a quick wash and dry (don't put velcro closures in with the wash, they like sticking to the jersey). Since I just bought this, I haven't tried the intended purpose of cool summer riding; but will do so in the coming months.
I'm 6' 2" and 190lbs and the 2XL fits just right with a medium weight base layer underneath. A base layer thicker would make a tighter fit in the sleeves. The length is satisfactory with a person of my height. The jacket is form fitting. The dual sleeve at the cuff makes for an air tight fit with gloves and is a great addition. I've worn the jacket at temps from 3C to 6C and it is almost too warm. With a medium base layer it should be comfortable down to -3C to -6C. The zipper is more robust that on similar Gore jackets and has a zipper flap to help seal out air and comes with a long tie which helps when wearing gloves. I expect the jacket to last quite a few seasons. Having a winter jacket with three back pockets is a definite plus.
I ordered the high vis yellow because I don't want the motorist who runs me down from behind claim he didn't see me which is good what's bad about it is that it's hard to keep clean especially if you encounter really grimy conditions so all is good on nice days with clean roads. If it had a black back panel like my vest It would be way better. I'm 5'7" and 150 and the large is nice and snug which it should be, nice stretch to the fabric. It blocks the wind really well and rain beads up on it. It also breaths really well, 0 claminess.
These Castelli Men's Tutto Nano Bibknickers are true to their description, meaning literally good at everything.
I already had the Entrata Bib knicker & while they are nice they designed for 59deg-95degF and are not thermal at all. These Tutto Nano Bibknickers are.
Castelli rates them for temps of 48deg-66degF & I have been using them in temps of 45deg to 70degF no problem.
I live at 4000' but it is not a snow type location our lows here are upper 30's but always warms to 70's+ on most 2-3 hour rides.
Foe me these have been perfect war enough & go unnoticed which is a compliment for any cycling apparel.
The Nano Flex 3G fabric is super comfy as is the Kiss Air2 seat pad. This fabric is even somewhat waterproof as the water in light rains just beads on surface. (I have not tested in downpour yet)
So overall very happy with these & coupled with the Castelli Entrata bibknickers I am covered for a wide temperature range that fits my location temps perfectly
Highly recommend these !