Purchased this the other day. I'm 175cm tall, 69kgs, athletic build. and I bought an M size. Although quite tight in the chest, the sleeves fit perfect, and once in the hunched over cycling position, it's quite comfortable. I have seen many customers say the sizing runs, small, but if you refer to the actual product pictures, it is meant to be a very close fit. I tried on an L size, but like another review said, its baggy/loose with folds in all the wrong places, so I went a size down. Not recommended if you have excess flab, because it will show haha. Love the colours (got the aqua blue), and despite slightly small/cheap feeling zipper, it does the job. Zipper pocket at the back is an extra bonus. Overview: Tight, but great if you can pull off the X-men look!

I bought this product primarily due to the color pattern. I've bought from the SL series before but it was a weird experience mainly on my end. I'm 5'10"" at 195 lbs with a spare tire around the waste; I know Im not in the best shape but covid made me thicker lol. I bought a XXL SL before because I wanted a looser fit. The material felt premium but the fit felt baggy in the wrong places. Fast forward to this red/ black fade pattern SL Air and I decided to by the XL and man it had a totally different fit. It felt more like skin in a good way and I bet a better fit if I lean out a little more. This version has a secret zipper pouch so that's a plus. I'd buy this again. I hope they continue with the fade patterns as we need more cool patterns.

I like this jersey so much that I've bought three. I'm a 6'0' 165 lbs and this fits me like a glove which is what the SL line is supposed to do vs RBX. I know I see that some other reviewers claim this jersey is too small vs their expectations. Think of SL as the slim fit and RBX as normal fit. If you're looking for a nice aero tight fit then get SL, but if you're looking for something a little more loose then go RBX. There are the most comfortable SL jerseys I've worn and I like the simple design.

Im 5'10"" at 193lbs. Kinda chubby around the waist. I don't like buying jeresys online as they all have different fits and I don't want to deal with shipping returns. Most bike jeresys run small. I tried on a XL at a store and it was form fitting but not super tight. I bought a XXL with light blue and blue last year in the same model and it was lose. I decided I wanted a more form fitting look so there aren't so many wrinkles with the material. It fit well and but I feel I need to lose a few pounds to make it look better lol. The red/black fade pattern is awesome. I wish they weren't so expensive though...

I'm 130 lbs 5'9"" I always have a hard time finding jerseys that a small size fit good on me...finally found nice jerseys that fit great, bought 4.!

I had to send this back. I weigh 150, 5'9"", and literally could not get a medium on. I would need an XL I imagine. That is clearly mis labeled sizing.

I wear a medium in just about everything and this fit like a xxsmall. Whats worse is. I bought this a while back and specialized has not answered my email to return this. I'm afraid I'm going to miss the 30 day window.

While the are very nicely made they most decidedly run way way small.

Returned. These are way too small by U.S. standards. I wear a large in almost every jersey brand and I could barely get these on..

Looks and feels like a nice jersey but beware the SL Air Jersey runs smaller than the same size SL Jersey. I'm 5'11'', 152 lbs and I like form-fitting jerseys but I had to return the Medium SL Air. Too small overall and one of the sleeves was cutting off blood circulation. Not an issue with the reg SL jersey.