This helmet has perfect balance of lightweight, aero, comfort, safety (proprietary MIPS equivalent) and ventilation. Most helmets out there compromise at least one of these factors, but the Ventral checks all those boxes. With my old Specialized Evade my head used to get warm on hot days with sweat dripping down onto my sunglasses, by comparison the Ventral is super breezy.
I live in SoCal, so having a ventilated and aero helmet is important for me. Ive use helmets from Specialized, Giro and Lazer and the Ventral is my favorite and most comfortable so far.
Size wise I am typically on the upper end of a medium, with some brands a large. The Ventral medium was too narrow, but the large is a perfect fit and doesnt appear big on my head. I would best compare the sizing to Kask helmets after trying both on.
Reposting review which originally showed up as anonymous
I bought the Ventral SPIN (orange, large) to replace a three year old Octal MIPS (also orange, large) that was damaged in a minor (and rather embarrassing) crash. I have not experienced any issues with the fit compared to the older helmet - fits just as well even over a Headsweats. The old helmet was well ventilated, but this one is even better. I really like the high visibility (but the old helmet had clearly faded a bit in the sun as the new one is much more orange). No complaints at all.
AFTER WATCHING A FACTORY TOUR AND REVIEW OF POC ON THE GLOBAL CYCLING NETWORK GCN ...I WAS SOLD. I'VE WORN SKI HELMETS, MOTOCYCLE HELMETS, AND BIKE HELMET FROM LEATHER TO BRANCALE, TO GIRO AND BELL BUT THIS ONE...THIS ONE IS THE ONE!!! IT INCREDIBLY LIGHT (DON'T EVEN KNOW IT'S ON MY HEAD) THE CHIN STRAPS ADJUST EASILY TO AVOID EAR CRUNCH .. AND REALLY YOU CAN FORGET IT'S ON .. . MY ONLY GRIP, WHEN I LOOK IN THE MIRROR IT'S HUGE LIKE A WATERMELON ON MY HEAD..BUT GET OVER IT .. IF IT DOES WHAT IT IS SUPPOSE TO DO IN A CRASH I'M HAPPY TO LIVE WITH THAT...
I bought the Ventral SPIN (orangelarge) to replace a three year old Octal MIPS (also orangelarge) that was damaged in a minor (and rather embarrassing) crash. I have not experienced any issues with the fit compared to the older helmet - fits just as well even over a Headsweats. The old helmet was well ventilated, but this one is even better. I really like the high visibility (but the old helmet had clearly faded a bit in the sun as the new one is much more orange). No complaints at all.
By all accounts this is a great helmet. Ultimate I had to return it because of the fit. In my case the medium fits my head perfectly and is super comfy. The problem is with the straps which are WAY too short. The straps hit me in the ear and weren't long enough to buckle comfortably. It's almost as if they installed the straps for a size small helmet into the medium that I ordered. I tried the large but couldn't make it quite tight enough. My Octal in size medium fits brilliantly.
So - I really like the helmet. Looks great, feels great. The straps are just too short.
I bought this to replace my five year old Octal, which has been one of my favorite helmets. Unfortunately, while the Octal fit my large (size 7-58) head perfectly, the Ventral doesn't. There was barely enough room on the sides to put it on, and with a thin skullcap it was uncomfortably snug (winter hats would be out of the question).
I'm disappointed, because this is a great helmet.
I have used the POC Ventral spin for a few months and have been very pleased. I bought the POC for the safety features while being light aero. I have found the fit to be perfect and very comfortable. It has so far surpassed my hight expectations.