Another OneK fan! I used to wear a CO Ayr8, and found I had to go to the OneK long oval to get a good fit. Comfy, light, looks nice. Really checks all the boxes 
OneK and Samshield are manufactured by the same company–Tae Young, Inc. in South Korea. The OneK is sized S/M/L and the Samshield is virtually the same shell with different liners available so the fit is more precise by hat size. I have a OneK that I need to replace for several reasons–it has aged and it slides all over the place and doesn’t fit right any more, but for shows it is way too hot for me. My son rides in a Samshield…the only one that really fit him properly but also it’s the fashion among young riders.
I would love to know more about Kask since it seems to have plenty of ventilation.
