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


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

July 16, 2024   Verified Purchase
Bought this to eliminate getting hit above the mask. It works great. Better yet, I've paired it with the Force3 traditional mask (V2) and it helps offset the weight of the mask too! I feel safe and confident with this combo!
July 15, 2024   Verified Purchase
I've used this for 2 tournaments after I replaced my mask frame after I was tired of washing my hats every weekend and dealing with sweat stains etc. Ventilation is nice and the foam padding is easily maneuverable to fit your head shape and No Sweat liners will fit in it. I personally use this with the Ump Life Ice Cap on really hot days to help keep my head cool. I like the added protection it provides that normal hats just don't. There is a neoprene strap to help secure against this skull cap, but I have found (at least for Diamond) that the original strap does work and stays it place but that could be different when it rains/gets wet. So far, I am very happy with this upgrade.
May 30, 2024   Verified Purchase
Extremely satisfied wearing this with my F3 Defender mask. In addition to the protection, it better distributes the weight and feel of the mask off the face pads. 7 3/8ths, bought the size L. It feels tight initially, but the pads will adjust quickly. Love that they are removable and washable. I won't go back to a cap.

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Questions About This Product

Q: How do you go about cleaning the pads inside the helmet?
– Rob Macdonald

Remove the padding and hand wash them with mild soap and water. Let dry in a well ventilated space.

– Sherie Sandifer
Office/Service Manager

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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.