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🧢 Protect your crown like a pro—comfort, style, and safety in one sleek insert!
The Ergodyne Skullerz 8945F(x) is a lightweight, flexible bump cap insert made from durable polyethylene. It offers up to 35% improved crown impact protection with a ribbed top design and maximizes airflow through all-over venting. Its patented trim-to-fit system ensures compatibility with any baseball hat or cap, delivering discreet, breathable head protection ideal for professionals seeking safety without sacrificing style or comfort.


















| ASIN | B09D16Q74W |
| Best Sellers Rank | 67,041 in DIY & Tools ( See Top 100 in DIY & Tools ) 50 in Hardhats |
| Brand | Ergodyne |
| Brand Name | Ergodyne |
| Closure Type | Pull-On |
| Colour | Anthracite Grey |
| Country Of Origin | USA |
| Customer Reviews | 4.6 out of 5 stars 4,002 Reviews |
| Included Components | 1 bump cap insert |
| Item Type Name | Universal Bump Cap Insert Extra Venting |
| Item Weight | 91 g |
| Item weight | 91 g |
| League | MMA |
| League Name | MMA |
| Manufacturer | Ergodyne |
| Manufacturer Part Number | 23481 |
| Material Type | Polyethylene |
| Model Name | Skullerz 8945f(x) Universal Bump Cap Insert - Extra Venting |
| Model Number | 8945F(x) |
| Number of Items | 1 |
| Size | Single |
| Style | Single |
| Style Name | Single |
| UPC | 720476234814 |
| Unit Count | 1.0 count |
B**T
Does the job, looks relatively discreet and offers good protection
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
K**N
Good insert
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
G**N
Bump hat inner
Does what it's supposed to. Good value for money.
D**R
Good protection & comfy
Fairly comfortable to wear and they do give that added protection. They also shape the caps well.
F**H
Useful But overpriced
I play Airsoft and usually wear a baseball cap For those of you that don't know it's a sport where grown men women (whatever you want to be called ) run around with you guns shooting each other with toy guns with solid plastic BB's and it hurts if you are hit in the head. This takes the pain away and allows you to wear your normal baseball cap It forms a better shape than a bump cap. You can't get away from the fact it's useful BUT it's very very very over priced
M**N
Quality product
Excellent quality, and fit. Just goes under baseball cap or a beanie. Husband loves them.
L**N
Very effective
Great head protector under a cap or beanie for tall people in my low- beamed hobbit house
C**S
Well made
Does the job and fits perfectly under a wool cap
N**Y
Très bonne protection de la tête !
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...
A**.
Fits great
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.
A**B
Ottima protezione e grande comfort
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.
V**V
Useful
I feel safe hiking under thick tree branches so kudos to inventor !
I**C
It works.
Fits into a variety of hats (as it should). It provides complete, consistent, excellent protection against instances of self-generated force (e.g. accidentally banging your head on steel shelving). I had to trim it to fit better, but it was along the intended area to trim for those with smaller heads.
Trustpilot
1 month ago
3 weeks ago