All-Star Cobalt Umpire Skull Cap

SC900UMP All-Star Cobalt Umpire Skull Cap Side View

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The Cobalt™ Skull Cap or "Skully" is the first hard shell skull cap made just for umpires and designed in collaboration with MLB & MiLB.

Aimed against bat backswings and to add an additional layer of force reduction, the helmet is like a coach's helmet but with enhanced shape, padding and features for baseball and softball umpires.

The shortened bill functions just like an umpire plate/combo (4-stitch) cap. It will fit under all brand or style umpire mask and not just All-Star masks.


  • Shortened bill fits with plenty of space in any umpire mask
  • Tough and durable polycarbonate shell
  • Textured sand matte finish to grip traditional harness (no harness upgrade needed)
  • Augmented padding in key zones along sides, rear, and top for added protection against bats
  • Removable padding system is machine washable
  • Fitted S to XL sizes to fit most head sizes. All-Star took head measurements of 50 MLB umpires to get the sizing right.
  • Bill length is 1 1/2"
  • Weight: 13 ounces


  • Interior: Remove the 3 pad which are Velcro'd in roof and headband of cap. Wash pads with warm water and mild soap. Rinse well and let hang dry in a well ventilated space
  • Clean the interior of the cap with a water/soap solution applied to a towel or use a disenfectant wipe
  • Exterior: See our Crew How-To on Buffing Scratches from your Cobalt Skull Cap

Product Video

Official Review: All-Star Cobalt Umpire Skull Cap

Ty takes you behind the plate with @AllStarSportsVids innovative skull cap designed specifically for baseball and softball umpires.

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Official Reviews


Robert M.

Windsor, Canada

July 3, 2023
Happy. Fits perfect, with my EvoShield mask. Followed sizing instructions on the website. Easy to remove and put back on. I have to sort out is when I bend down to clean the plate. Sweat from the headband (inside the helmet) drips down onto the plate. #nobigdeal As always Ump Attire offers great how to videos and product reviews, which helps with the buying process, sizing and cleaning of the helmet. Well done. Let’s play two!!

Joffrey W.

Tuscaloosa, AL

May 28, 2023
Very satisfied with this purchase!! It gives you that 360 protection for your head!! As umpires, we never know when that pop-up is going to come or where it’s going to land for that matter!! Personally, I’ve already had a few, and let’s just say I’m glad I had this on!! Also, believe it or not, it actually saves you a lot of money on your field hats!! We all know how expensive hats are and how quickly they get sweated out from wearing them while working the plate!! Since I’ve gone to this skull hat while working the plate, I’ve saved a small fortune on field hats!! That alone is worth making the switch in my book! Plus you can’t beat the added protection!!! So yes I highly recommend making the switch!! Not only will your wallet thank you, but so will your wife!!

John M.

San Ramon, CA

April 3, 2023
First umpire skull cap had a defect on the padding, Ump-Attire replaced it with no issue. However, I wore mine with my mask in the house before going on field, practiced taking it off, moved around and did not like it. It's going to be hotter and summer arrives. Nice look but not for me.

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Questions About This Product

Q: Could it fit with a Force3 mask and Wilson?
– Kyson Scurry

Yes, the All-Star Cobalt Umpire Skull Cap is compatible with the Force 3 and Wilson masks. It may take some adjustment to the mask harness or potentially replacing the mask harness with a premium neoprene mask harness which helps grip the skull cap helmet better.

– Ty Unthank
Marketing Specialist, HS & College Umpire

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WARNING: Participants in any sports activity assume risk of injury. This equipment may be used to help aid in preventing or reducing the extent of injury. No equipment can guarantee umpire or player safety from injury during participation, and use of this equipment carries no such guarantee. Do not use any umpire equipment that is damaged in any way.