DEMON UNITEDFR Link System Mountain Bike Helmet Fullface with Removable Chin Guard- Includes Head Cinch Adjuster and Padded Cheek Fit Kit

I have tried many helmets but most were too small. This one fits my big head!

I decided it would be a good idea to get a helmet that guards my mouth from the rocks I tend to land on.The #1 reason I didn't have a full face helmet before was because of extra weight.The #2 was I didn't want to feel too enclosed.After a lot of searching I came across this. The reason I almost didn't order them was because of the one size fits all. I am 6'-6" tall, and my head is very big. It happens to match the rest of me. I ordered the helmet anyway. I can always send it back.I received the helmet and took all of the extra padding in it (for people without big heads, I guess). I also removed the velcro strips. Didn't want those rubbing my face. Then I loosened the rear band until it was at it's biggest point.I tried it on, and it was definitely big enough! It was also SUPER lightweight. I LOVE it!I will use this full face helmet on the rocky gnarly trails I go on. I won't mess with taking the chin guard off. I'll just keep my other helmet for the easier trails I go on.Do I feel this lightweight helmet will protect my head in a mountain bike crash? Definitely.It does have a sign on the inside that appears to be "no motorized vehicles", so maybe it's not safe for E-bikes. I've seen them going about 30 mph on the single track I ride, so I would recommend a motorcycle helmet if you're riding a motorized bike.Do I have any complaints at all? No.I am so happy my mouth will be protected from now on.

Very good overall. good quality padding and stitching.Well ventilated even when using with full face.Suggesting to improve the latch mechanism for the chin guard (need to take helmet off) and wider sun visor

I've been riding with this helmet exclusively for a solid year now in the Pacific Northwest in the summer and in Baja, Mexico in the winter. Though I've yet to have a crash with it, the chin guard has a solid connection that I trust would be ample protection, should I need it. I ride uphill without the chin guard in place, and then clip it in before starting my downhill. I always take the helmet off to re-attach the chin guard. I find the helmet without chin guard a bit warmer than others, but not too much warmer, very acceptable. A bonus that I've found recently is that my new bone conduction headphones fit underneath with chin guard both in place and detached!

Cheap lightweight helmet. Fell apart after a month of use. While it did fit good. It fell apart. Emailed customer service. They wanted me to pay for part and shipping. Normal companies do not do this. It is a warranty item and should be covered. Spend your money on another brand. This is what happens when we buy the cheapest brand trying to save money. It will not last long term. Buy elsewhere

I use this helmet daily ( both with the front protector and without). Its very easy to remove the front protector if needed. When I got my e bike it came with a free helmet but this Helmet makes me feel more safe and feels much stronger. With the front face protector on I feel more protected on the roads. It's very light weight and the way it fits on my head feels very secure. Got a Great bike and now a Great Helmet. Now My wife wants one too. When it comes to safety I don't skimp. I checked this Helmet out and got what I needed. All the best out there on your biking journeys.

Bought this for riding electric unicycles. No accidents yet so can't evaluate the protection. The removable jaw does take some fumbling to align and reinstall, not a quick snap-on if you care, I leave it on and I also have a bike helmet. I stapled a strap to the back for clipping a red blinker. Sun visor is pretty narrow, it certainly isn't skin protection, but it's great for riding into the sunrise. Goes on with care especially if wearing a Bluetooth headset, it's a tight fit.UPDATE 2yrs: I had a 15mph fast fall, "clotheslined" feet swept from under me, jaw and visor hit the ground and have minor cosmetic damage, glad it wasn't my face. Ratchet in adjuster knob began slipping, couldn't find why but works better after reassembling.UPDATE 3yrs: I'm having some onset of tinnitus, and I'm pretty sure it's the wind noise inside this helmet. It's way noisier than my bike helmet, I turn my Shokz all the way up and still can't hear. I found products for quieting bike helmets, they do work on my bike helmet but they don't work on this helmet. This helmet needs some kind of foam/fuzz/cushion air dam in front of the ears to bring the dB level of wind noise down below the injury threshold.Also the mechanical stops on the visor both crumbled and I had to rebuild them or remove the visor.