Occunomix V410-B03 Vulcan Baseball Bump Cap, Navy

Some reviewers have commented on the one-size not working for them. I wear L/XL hats so perhaps this isn't for everyone. It does require modification for most hats. I have one that fit unmodified. I also have two that I modified with very good results and may order more. Just out of the box, these are big enough, but not shaped correctly to fit comfortably. For me, they were too oval (long front to back and narrow).I have one wide-brimmed, floppy hat that provides very good shade, but is too big. It always fell off or down over my eyes, and stayed terribly mis-shaped. I tucked the bump cap (with no trimming) in under the sweat band and now the hat fits perfectly. The hat makes the bump cap more circular and the bump cap keeps the hat in a nice shape.Next I tried a baseball hat and a floppy hat from REI with a neck shade. Both required trimming the bump caps to make them fit. I adjusted the hats to where they were slightly too big then trimmed the bump caps to fit. In both cases, I am very happy with the results.My theory is that since the circumference of the bump cap becomes smaller as you trim more off of the bottom, that you can get a good fit for a wide variety of head size and hat shapes, as long as the hat can be adjusted slightly too big without the bump cap. So obviously this will not work in a hat that fits you perfectly and isn't adjustable.I am just saying it works very well for me, and I admit I am skeptical for anyone who wears S/XS.

The description of this insert makes no mention of cap size. I wear size 7 3/4 fitted cap. The insert is a little tight at the temples. The insert does fitinside the sweat band of a fitted Fifty-nine Fifty MLB cap. The insert is not visible as it would be in the rear of a "one size" adjustable cap. The insert is very visible under a "low profile" cap.The ERB 19402 create a cap insert fits me more comfortably and fits nicely inside the sweat band of a fitted Thirty nine Thirty MLB cap.It,too is visible from the rear when used under a "one size" cap or low profile cap. The ERB can not be purchased separately; it is sold as an add-on item.

I use this cap for Airsoft. It's well made and it's protected my head from bumping into obstacles.

After trimming off almost 3/4", I finally got it into my biggest cap; which was kinda dorky for me to start with - but it does protect from bumps. The insert is rather flat on top and wide at the transition from side to top. My head is not flat on top, so it doesn't fit very well. I had to do extra tightening of the cap adjustment to keep the cap from falling off easily. I tried heating the insert in hot water to re-form the almost flat top into a more curved top; but that didn't chane the shape like it needs to be changed. I went back to wearing the one I made from one of those plastic license plates with the dealers name on it. It doesn't provide as much protection; but it does keep me from skinning my head when working in attics.

Doesn't fit to well inside the hat or on top of the head which I saw in previous reviews but decided to try it anyways and regret it

it didn't fit in a way that would stay on my head

This all started w/a heavy/bright headlamp that was recently purchased and it hurt my forehead,tried wearing a sweat band for cushion,then the weight became a factor,so...I thought: a 'bump hat" might cure that problem,it did all that,and I don't have to fumble with anyhing,throw the bump hat on and instant light for my many tiny hobbies that require pinpoint lighting,paid $6 for this lid.Problem solved.

This insert works very well for Paintball. I saw a friend of mine wearing it and ordered one. It really helps protect one's head from head shots, those hurt quite a bit, don't want to end up with parkinson's. Just thought I would share that, it could be helpful.