Hi. I bought the Jackson Ribcap a few weeks ago, have skated with it 5 times, and love it. It's not made exclusively, or even primarily, for skiing. It's to be worn biking, skating, skiing, or in any other cooler weather sport where the person wants a more head protection than nothing at all and yet doesn't want to wear a hard helmet. It's a really adorable "hat" and looks like a riding helmet a bit. The chin strap is adjustable in length with velcro and buckles to close. The "ribs" feel like VERY firm memory foam. Think of a memory foam pillow in a cold room in winter. Firm but you can indent it a little with your fingers. So, no, it's not going to give you the same protection as a hard helmet. But, I believe it would give enough to prevent a concussion. I didn't want to wear my ski helmet or one of those full head bike helmets out there. So, the Ribcap is, for me, the perfect solution. Warm, fashionable, and protective without looking or feeling like a hockey player. I don't find it to be too warm for skating.
The price is a little steep but my head and my way of life are very important to me. A head injury can be a life changing event and it's just not worth it to go naked. My second day back on the ice (I've just returned to skating after 30 years off), I saw a woman around my age (40) skating with her kids who slipped and...WHACK! I saw it and heard a crack when she landed. And she was practically standing still when it happened. She was dazed and I helped her off the ice. She said she felt a lump rising in the back of her and I warned her to please, please be careful and watch out for signs of concussion. Knock wood, I haven't fallen yet but I know I will at some point. I pray that I never injure myself but I feel much better and more confident knowing there are firm bands of foam around my skull just in case.
As for sizing, I measured my head and followed the size chart. I was on the high end of Small. If I could do it again, I might order a Medium because my forehead gets indented from the hat's elastic band which takes hours to fade away. In fact, I think I can see a faint reminder of it the next day in very bright light. But, then, I have super sensitive skin and sunglasses do that to my nose as well. I'm just lucky that way.
So, that's my ramble about the Ribcap. I'll let you know if, G-d forbid, I ever hit my head and really put it to the test. Yikes. Hope that helps!
Oh, here I am in my Anthracite Jackson Ribcap...