8945F(x)

Let me paint a picture: I’m in my garage, just vibing, when BAM, another stealth attack from the corner of a shelf I installed myself. That’s when I knew I had two choices: start wearing a helmet like I’m in a continuous episode of “Jackass,” or find something subtle that doesn’t make me look like I’m prepping for a medieval joust. Enter the Ergodyne Skullerz 8945F(x), the Tony Stark of bump cap inserts. It’s slim. It’s flexible. It slides into your everyday cap like it’s just chilling, but secretly it’s out here saving your brain cells from betrayal by doors, beams, and open hatchbacks. The first time I wore it, I tested it the only way a mature adult would: I headbutted a cabinet on purpose. (Okay, it was on accident, but let’s say it was research.) And you know what? No stars. No birds. Just a satisfying thud followed by smug silence. My hat didn’t even shift. I strutted off like I’d just won a bar fight with drywall. Comfort-wise, it’s weirdly impressive. It’s like a tiny turtle shell for your head, but breathable and discreet. I wore it for hours and forgot it was even in my hat until I took it off and flinched like my head had been abandoned. If you work in tight spaces, bump your head a lot, or just want to feel lowkey invincible while doing chores, this little guy is worth it. Bonus: you’ll look exactly the same, but with 100% more head protection and 78% fewer curse words shouted at inanimate objects. 10/10 would recommend. Cabinet corners, beware.

I ordered a pair of these in October 2023, and I write this review August 2025. I'm still on the first of the two-pack, and I have one inserted into a baseball cap 100% of the time I wear one, which is pretty much every day. So I have hundreds of hours of wearing this bump cap insert so far. I tend to hurt myself when I'm busy, overwhelmed, distracted, tired, or running late, whether it's bumping my head on something or stubbing a toe or running into a door frame or the edge of a table. These little cap protectors really work, and they've saved my head from probably dozens or hundreds of small bumps. Example: Have you ever opened your garage door only part-way because you just need to do something real quick and then stood up and bumped your head on it? Hurts pretty bad. Wearing an Ergodyne Skullerz bump cap insert really does absorb and disperse a lot of the force and shock that would otherwise be transferred to your head, taking it from an ouchie and potential injury to a nothing-burger. Have you ever tried to pick something up from under a desk or table and misjudged where the edge was when standing back up? Have you ever been working on your car and bumped your head? These really do work, and mine are still in immaculate condition (no scratches or cracks) after more than a year and a half, so it appears very durable. Caveat, these aren't helmets and obviously won't protect from serious forces, but for every day wear? Perfect. Not a single person has made a comment or noticed, so they are pretty much invisible under most caps. You can sort of see the gray on the back of the cap where you adjust the size of the cap, but it's not a big deal. Highly recommended and really do save your head from minor bumps.

I purchased this for my father, who works with electricians and plumbers and the like, and often finds himself surrounded by all manner of things you don't want to knock your head against. As such, this is a second-hand account. He reports that the cap is quite comfortable, fits in his hat without issues, and has given him no trouble. It isn't a hardhat, but that is not what it is for. It breathes well enough, it doesn't look all that hokey, and it is very lightweight, which means once you get used to it, you can about forget it is there. Based on that, I'd say this is a good buy. Anyone who has smacked their head on a rafter, stood up under a cabinet door, or had a hand tool dropped on their skull, knows how amazingly unpleasant an experience can be. If you are in a situation where that's likely to occur, this seems like a the right way to go.

Fits perfectly inside a baseball hat and is comfortable. Definitely a head protector.👍👍

What took me so long to think of this? The husband has been wearing a bike helmet for years while working in the attic, trimming stuff in the garden ,and just wearing a regular cap working under automobiles and tooling around in the garage. ,finishing all those duties that a good man does for his wife. I'm a stickler for safety: ear plugs, safety glasses, etc.( Gotta stay away for the ER at any cost.) The crawl space can be a challenge with a bulky bike helmet and when bending over in tight spaces. Bumping your head under the car with your body at difficult angles.... We were having cable installed through the attic to reach over to the other side of the house and I realized something had to change about this head gear if he was going to be able to do this project successfully. Alas, I come to Amazon, read about this Bump cap, and BTW, the reviews and videos were wonderful, so I ordered it right away. It arrived the next day and he gave me this crazy look : like I just bought an expensive hand bag. Well, we finished the fiber install with the cable guy ,crawl space and all, put away all the attic contents without a sound. After all was done, 5 hours later, he was THRILLED with the fit of the Cap inside one of his own baseball caps. He said it was comfortable, banged his head numerous times on the attic beams while finishing up the job and was so happy that he was protected, safe and much more comfortable that the bike helmet. BIG smile on his face. It has prime real estate on the garage hook for all future projects. Bike helmets are for bikes.... thank you very much! SO, I cannot say enough positive things about this cap. He did not need to trim it , but it says you can if needed. He is 5'10 in tall with an average size head. Buy this bump cap for your person that needs extra protection while working so they can stay safe!!

J'ai acheté cette protection pour mettre sous un chapeau en wingfoil. Elle passe très bien et ne bouge pas une fois le chapeau enfilé, et même après de grosses chutes. Je me suis déjà prit la planche et le foil sur la tête et bien je peux dire que ça protège très bien. On peut facilement découper la protection pour l'adapter à quasiment n'importe quelle casquette/chapeau/etc...

It fit in my cap great and no one can tell it’s there. I work in an environment with low hanging obstacles and this offers just enough security.

Ottimo prodotto, sono molto soddisfatto dell'acquisto. Molto facile da adattare alla misura del cappello, si può tagliare comodamente con forbici (purchè siano ben affilate). Ho applicato la protezione ad un cappello che utilizzo per fare windsurf: è risultata molto più confortevole di quanto mi sarei aspettato, ed oltre a proteggere dagli impatti risulta anche molto fresco, grazie alla forma rigida cd ai fori presenti lateralmente passa molta più aria rispetto al cappello senza protezione. Non è molto economico, ma lo ricomprerei.

I feel safe hiking under thick tree branches so kudos to inventor !

Well vented. Good protection against small/slight bumps (in and out of a van all day long). Bought as a replacement insert for a port west (small peak) bump cap PS59 which it fits perfectly. Doesn't fit the large brim port west bump cap. Would buy again