I'm really happy with this helmet. A replacement for the one that I lost when my former bike was stolen. Features I really wanted, and got: (a) fairly lightweight, but does not feel flimsy at all. (b) Adjustable rear "wheel" allows for a precise fit, which means greater comfort and more stability. I have a weirdly large head, so getting a good fit is always a challenge for me. LOL. I wish this had a bit more interior padding, but it's absolutely fine as is. I've done several 3+ hour bike rides so far, and no chaffing, no discomfort at all. (c) the helmet is not solid--there are vents/holes in it. I guess this is done to reduce the weight and/or allow wind to cool off your head. Those are nice, but not super-important to me. But...these vents meant that I could zip-tie a headlight to the helmet, which is far better for me when riding at night than having a fixed light attached to my handlebars. (I have this, as well.) I love having a light attached to me helmet, as it means that if I need to look to either side, the light follows my line of vision. I feel much safer with this, and would never buy another helmet without vents in the future.The helmet little bit uncomfortable for my head right now. I wear it almost twenty days aprox. three hours/day equivalent. The first days active wear of helmet, I was felt much pressure on my head than now. I think, I need to wear it much more longer to break down that pressure. The back light is working well and has three different position to change the light. It's very easy and you can change it right on your way of your ride without removing the helmet from your head. Finally, the item came with user manual, the carry bag and a spare battery which certainly necessary things to keep your helmet safe and just in order.This helmet will do the job, but a couple items leave me somewhat unimpressed.First, of course the straps weren't even close to a fit, so I had to make adjustments, and this was a process that I found to be very frustrating. You have to somehow get behind the helmet cushions to move the straps through the buckles. It was hard to do and my results were less than stellar. It's still out of whack and I'm still working on it.Then, part of the cushion that rests on the back of my head was glued on at the wrong spot, so I had to pull it off and re-glue it. It won't lay flat, though, because it had been in the wrong position probably since manufacture. More glue needed.The helmet came with a cushion that is attached by Velcro to the chin strap, but I haven't figured out exactly how it's supposed to be used. Nothing in the instructions.The helmet comes with a small spaghetti-strap backpack that will be useless to anyone who regularly wears a standard bike jersey with pockets.On the good side, it's a nice looking helmet, sits a little higher up on my head than my last helmet (which I like), and it's very light. The visor positioning seems perfect, and the rear light is a nice touch. Final fitting is done by rotating a handy little wheel.I could write a very long review but my main point about this helmet is VENTILATION.I am bald and my previous helmet was so bad that even after 5 minutes with it and I sweated like crazy on my head and forhead. This helmet has a great ventilation system and it avoids all the issues I had with the previous helmet. I am very satisfied and would recommend it.It is also very light!Dig the lights. Helmet fits my big noggin well and comfortably.Great helmet. Good ventilation. Like the visor. As far as I'm concerned, the same as helmet I bought that cost twice as much.Fits well with adjustable head band, rear facing red light provides safety with three modes, flashing, blinking and steady on.Appreciated the light weigh. A little issue with the adjustment straps. Fortunately, no crashes so I can’t really speak to effectiveness.Cómodo, ligero, funcional, el ajuste posterior es muy práctico. La luz tiene diferente funciones. Me gusto mucho, muy recomendable. Los materiales se sienten de buena calidad.El casco se siente duro y resistente me gusta la calidad en cuánto al precio creo que es muy razonable tiene diferentes tipos de luz para rodar parte de la noche o de madrugadaMuy buen casco, cómodo y seguro, con varias variantes de luces traseras en casco.Bien el casco, cubre para algo sencillo pero no si sales a algo más rudo.. el unicel que tiene por dentro se ve frágil.