This is the bazillionth helmet I've owned in my 56 years on earth. I've worn $1850 motorcycle helmets and I've worn at least 50 Bike helmets costing over $150 each and many in the $300 range.Some are truly excellent helmets but I am a believer in the right helmet for the right conditions and in that pursuit, I needed a proper mountain cycling and trails riding helmet. I ride an eBike and I really wanted too have a proper excellent helmet that I could wear comfortably for hours and hours of North Carolina Summers and a little bit chilly Winters.After trying many full face helmets of many different manufacturers, I tried the Giro Switchblade MIPS edition. This one is an exceptional rendering of a modular full face with detachable chin guard. I am very impressed with Giro products and I am pleased with them, especially after really putting them to the test.Clearly I do not want to crash in order to test the crash worthiness of this helmet. However; Giro publishes their crash testing findings and this helmet has been awarded all of the certs that matter to me.This helmet is super comfortable so I can stand to wear it in the heat and cold and rain and such, for the 99% of the time I am not having an epic eBike crash. I have to say, this is very comfortable. Not just on the first minute of the ride, but the 6th hour as well.I've read some reviews which speak to a concern that the detachable chin guard wouldn't withstand the potential impacts it is designed for. Honestly, I am not sure why this would be a concern because It is super super sturdy and yank as you might, it isn't coming off unless it wasn't latched properly, which is user error.I have lots of non full face helmets, so I don't need another one but the fact that this can be released to become a really excellent open face helmet. I feel like I got two for one here and the fact that it is so easy to custom fit the interior and the extra cheek pads are helpful.The fit and finish is really excellent as well. So why did I rate comfort at three stars when I am really happy with this helmet? Because it lacks the interior padding I think it warrants. It is a bit thin on the top due to pads that are a little bit too thin on the top and upper sides. The helmet isn't UNcomfortable, it just lacks the interior padding that would put it to five stars in my book.I believe the price to be very fair given what you get. This is an impressive helmet!!!I needed a downhill helmet for bike parks and had my eye on this one for a couple of years. Reading the reviews had me concerned about trapped heat and airflow since the ear area is enclosed. I ride motorcycles so I’m acclimated to dealing with helmet heat but this was a non issue with this helmet FOR ME. The padding is nowhere near the ears and the vent holes allowed plenty of airflow. I recommend it.Luckily I haven’t gone face first into a tree, but feels sturdy and reassuring. fits well, ventilation is ok.I really love this helmet it’s true to size comfortable easy to adjust, It is everything that you could look for in a solid full face. My only issue is quality from manufacturing. My helmet arrived with some minor scratches and manufacturing glue seeping out of the edges obviously these aren’t super noticeable but to me right out of the box looking up close it annoyed me. This quality is likely the same for all helmets but it’s so minor only you would notice and you can clean some of the glue up with an X-Acto knife and isopropyl alcohol.It’s honestly a very good helmet for the price but the little imperfections were unexpected and off putting. At the end of the day it’s comfy and protects your brain, that’s all you needGiro Switchblade MIPSOnline reviews tend to state or imply the helmet is hot. This has not been my experience and I ride in eastern TN where the humidity can be high and temps are hot. It's a great helmet for the Enduro/DH rider.Like everything I've purchased from Giro, this product is totally overpriced for what it is, but a well designed and super sturdy helmet, with a great internal fastening system (I have two mips helmets, one for air and another for land).Used mine for a summer of BASE jumping - it's perfect for those smart enough to want a real helmet with a full face system (most skydive/base helmets are just expensive camera mounts...). Remember, you can't save yourself after a cliff or building strike if the hit knocks you the f*&# out!! Also, full face makes sense when you realize insurance doesn't cover the $20k+ cost of dental implants to replace the teeth you just knocked out because maybe you reached a little too much at deployment and opened with a 180... (must have been the pack job)For those of us stupid enough to use it for base jumping, I recommend removing the visor as this can be a snag point. If you're jumping a building drunk, at 3am after dancing salsa for several hours on a Friday night, the sun isn't much of an issue anyway. However, the visor is the most natural camera mount, so if you want to share your idiocy with hordes of online admirers, the alternative is to mount a camera on the top of the helmet with a 3M sticky pad, which you can literally rip off in a half second if snagged. There is no quick release system like with a SD helmet, but that's not so important for the low stuff, now is it...Also, this will not be as rugged as other helmets with a plastic or fiberglass cover, so keep it on the top of your stash bag and try not to bash it along rocks, trees, or security guards along the climb to your desired exit point.I use this on my OneWheel. It’s stupidly comfy. The double D ring is comfortable and the ratcheting mech on the back is perfect. I don’t even feel the helmet when wearing it. It’s not tight in the checks like a motorcycle helmet so talking is easy and you won’t bite your cheeks. The vents keep air cool and also don’t impart hearing at all. I’m also able to slip the helmet on while wearing bone conducting headphones. The two air vents near the ears are perfect to help line them up and adjust. Ect really nice helmet.Having been involved in an accident and hitting my head on the road I needed to replace my GiroCypher because that is what you do when your helmet smacks into the road so...I chose this helmet because they are almost identical and i found somethings were noticably different.The Cypher had massive amounts of internal padding making my face squashed and that was on the largest helmet size they did. (So much so that I trained the cheek pads to fit better by wrapping elastic bands on them) and the helmet had a couple of vents but was otherwise solid. Also i never used the chinstrap because it made me feel nauseas.So, with that out of the way I went and bought this helmet at the same size as the Cypher expecting the same cheek squashing internal padding...and there was none. In fact the pads are so light I could probably have done with a size smaller but it was not that bad, just a lot more comfortable. Then I saw all the vents in the helmet, way more than the Cypher had and when riding now I can feel the air moving, I can feel rain drops getting through but most importantly, I used to sweat like crazy, even in winter, but now, barely anything at all and the internal pads are dry, that was an improvement.And then we come to the strap, still a D-Ring but the straps arebetter, they are fixed to the helmet in a better place so when under the chin they are not around my throat and making me feel like I want to throw up.Summary: Better vented, less sweat builds up, feels more comfortable with the chinstrap. Maybe could have gone with a smaller size as it feels like it has a little more room inside. The front face can detach but I do not want to do so, if i am going to hit the ground I would rather have a piece of armour there.Definately a decent helmet. Maybe not a full 5/5 but a very solid 4/5.It relay good fits nice and feels very sicure and look well cool with chin grad in or outOnly bad bits not use in hot summer months and think I might be little not but better hot and supper safe I surpriseAnd not masave fan of the chin strap it a little too big and an normal quick realise snap on snap of would be betterBut that’s only things I can think off their rest is supper goodBut best is the helmet seems to be supper strong and feel very save with it onGreat helmet. After using the TLD A1 and A2 helmets for years, this was my first open/full face helmet. I've only used it as an open face so far but the fit and protection feels very comfortable and secure. The cheek pads press nicely without squashing, making you feel like you're way more protected than a standard trail helmet. In the TLD I wear a large but after reading a review recommending to size down with the Giro I went for the medium and it fits great. I'm a 59cm fit and M fits well.Great helmet but the wrong size arrived. Easy to send back and get a refund but I really don't need the hassle.Awesome helmet awesome quality