Ergodyne Skullerz 8945F(x) Universal Bump Cap Insert with Extra Venting, Fits Into Any Baseball Hat, Charcoal

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'm tall, so I end up hitting my head a lot at work. Fits nice under a brimless cap after a little trimming. It's got ventilation holes, but the wind really has to be blowing to evaporate the sweat that collects in it (the cap it sits in is mesh). It also has a foam rubber pad in the top to help absorb impact. It's lightweight, so you'll barely notice it's on your head. It seems sturdy. I doubt I'll have to buy another any time soon. Most importantly, no more scars and scabs on my head.

It’s lightweight, easy to fit into pretty much any hat, and gives you that extra protection from bumps and low clearances without having to wear a full hard hat. It’s not bulky either, so it’s comfortable enough to wear for long periods on the job. The trim-to-fit design is nice too it actually lets you get a good fit depending on your hat. The protection is legit for what it’s meant for just everyday jobsite bumps and scrapes. Definitely something I’d keep in my hat if I’m working in tighter areas. Only downside is the breathability in the summer. Even though it has vents, your head can still get pretty hot when you’re out in the heat all day. The airflow helps a little, but not enough to fully keep you cool. Overall, it’s comfortable, useful, and adds a good level of protection you just might feel it more when it’s really hot out.

If I could give it 10 stars I would. Wish I had this 30 yrs ago when I started as a mechanic. I cut mine down alittle so it would fit all my working ballcaps. Works great, looks good, and I feel like this should be on a tool truck. I'm 6'4 and have banged my head more times then I can count. This helps.

not visible when in your hat. easy to install adjustable is really easy. very sturdy. size fits all. very soft on your head

Fits a hat great. Provides all the protection i need.

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 bought this to put in a baseball hat that I bought online not realizing it was so flimsy. Once I put this insert in I felt like I was wearing helmet from the Vietnam war. Though I have no experience with that. That is the image that came into my mind. I would not recommend this product because it is just too heavy and still didn't completely smooth out the front of my hat. It almost seemed like it was a hair too big

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 !

After two major brain surgeries last year, I was left with a sizable peice of my skull missing, so needed something to protect my brain at work. I ordered some bump caps and none of them looked, just like a hat. The medical head guards look like cycle helmets, so I'd rather go unprotected tbh. These fit inside the rim of my docker cap tightly, but they go in, I've not tried them in a baseball cap yet. In the summer time it does get hot, but I don't think there's much to be done about that