I already own a Mojave jersey in a size S that is almost a perfect race fit, and knowing that WYN Republic jerseys are generally race-fit, I figured that this even more race-inspired Luceo Hex jersey would be even more race-fit in a size S. Interestingly enough, it doesn't fit me any better than the Mojave size S. In fact it's a bit loose in certain areas (sleeves, upper back, and chest). Keep in mind I'm 5' 7" (171.5cm) tall, 135-lbs (61.5kg), with a 36" (91.5cm) chest and a 31" (79cm) waist.
While I would have preferred a true race-fit from this jersey (it's my own fault for cutting the tags before being certain of the fit), it makes for a more relaxed fit jersey that isn't quite as relaxed as a club-fit jersey, which I hate. The fabrics breathe and wick sweat well, the waist gripper works well, and the pockets are incredibly accessible. despite not having laser cut sleeves, the flatlock-stitched cuffs stay flat and aerodynamic and don't ride up over time. I absolutely love the turmeric color...I like other colors too...I'll just have to remember to go down to a size XS.