Castelli GPM Short Sleeve Jersey

This was my first Castelli purchase and everyone says to size up in Castelli clothing. To test this I bought a medium and a large in this jersey just to make sure. Well I should have saved myself the trouble and sized up like the masses say because they are correct. Instead of my usual medium in cycling clothing, I am a large in Castelli. Fortunately returns are easy with Backcountry. I?m 5?9?, 145 lbs. with skinny arms and a 36?-37? chest and the large fits good. It?s a fairly snug fit with a little bit of play in the stomach area. It?s a pro-cut jersey so it?s supposed to be tight. It?s not a skinsuit tight though. I probably could have crammed into a medium but it would been a little uncomfortable. Quality is top-notch and the fabric is super comfortable and very lightweight. It?s a hot weather jersey. I wear it during the hottest part of the summer here in SW Florida and it?s my coolest jersey. The extra zipper pocket is a nice bonus even though I?ll probably never use it and the sleeves grip nicely and are just the right length. My only complaint is that the Castelli logo/badge is annoying if you?re wearing shorts instead of bibshorts. The straps of my bibs line up to where the badge is so you don?t feel the logo. But if you?re wearing shorts you can feel the badge through the shirt and it?s itchy and uncomfortable. Because I love everything else about the jersey and because I got a good deal on it I kept it. You can remedy the logo/badge situation by putting a nickel-sized piece of athletic tape on the inside of the shirt when you wear it. Overall I?m very happy with this jersey and would buy another.

I really enjoy this jersey. I have it in the red and the white versions and I'm considering getting either the black or the cyan as well. It's super light and breathable which makes it suitable for the hottest of days. The fit is top notch and is similar to most other Castelli jerseys. However, the more subtle design of this jersey fits my style much better than most other Castelli product. The style combined with the fit is the reason I enjoy this jersey so much. For those who've read other reviews about having to return for larger sizes...stick to the size chart. Take the few minutes required to actually take measurements and you'll be much less likely to have to return for a different size. I'm 6' 1" tall and 170 lbs with approximately a 39" chest and got the large. Ordering based on the size chart and measurements got me the right size.

I ended up purchasing an XXL thinking this would be a race-fit or probably be real tight, but it's loose enough to keep me comfortable all day on the saddle in the heat without having to mess with my collar too much or re-position it.
I'm in between an XL and XXL I guess, 5'11.5" and 220lbs (44" chest) and the pockets felt a bit loose, so I was worried if I lost weight it wouldn't fit, but I figure I'll just get it tailored to the exact fit when that happens.
Anyhow, the performance of the jersey is awesome! It's clean, looks good, and kept me dry on a sunny day, but the morning was a bit chilly and I wasn't freezing.
The interior lining feels great, the pockets are roomy, and it's just an all around comfortable fit. Very pleased with this!

I really, really, really like this jersey! Like others have said, this jersey feels perfect when in the cycling position because of how it's cut. The sleeve length is just right and it doesn't ride up my arms like other jersey brands do. The stratus material loves to breathe. The more you sweat, the jersey starts feeling like second skin. I just wish it was a tad bit shorter in length. I'm 5'8" at 149 and I got a size L. The chest measurement from the sizing chart is just right, so size up!

I think this is a great jersey given how much it costs. The sizing is tough as usual for castelli things, but you know that going on. I'm 6'2, 175lbs and I wear a large. I think it is a little too big. Maybe if I drop a couple pounds I can squeeze into a medium and it will be a perfect racey fit. :)
Materials and everything feel great and very high quality. I use a couple of these as my daily training jerseys and they are great.

This jersey is definitely constructed with the "fit"rider in mind, and I am not entirely cut from that cloth. I am 5'8", 180 lbs, and semi-fit, but that didn't stop me from ordering it. I originally ordered a size up from my usual Large and the XL was just a little to snug. I exchanged for a XXL and that fit fine. A Sleek Italian design procured from quality materials makes this one of my favorite jerseys!

The red logo looks cool but it's a hard shiny button. Assume the position first before evaluating the fit. The shoulder/armpit area feels weird/tight standing in front of the mirror but forms into place nicely leaning over on the bike. Go a size up with this eurodog stuff. Snug, which means it's not my most comfortable.

Comfortable jersey. I usually dress size "L", but this jersey is too small in shoulder/armpit area.
So I got size "LX"
I am 185cm = 6'1", 75.5kg = 166 lbs and chest 103cm = 40.25"
I most cases you will have to go one size up.
Looks like this design is for real climbers body shape :-)
Schleck, Contador etc...

This is a great jersey - does everything you expect with wicking and comfort and color. I am a 44" chest and 5'10" and the XXL is the right size (almost a race fit). No riding up - easy to reach pockets - full zip. No complaints at all - love Castelli kit.

everything is very nice, except the black has faded badly on the back compared to the front.
fit is good, nice and lightweight good for the summers in socal, key pocket is a nice touch. like others have mentioned the little hard logo is weird.