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


  • 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


Ralph B.

Victoria, BC

June 16, 2022
I wear a 7 1/4" fitted cap and was not sure if this Skull cap would be snug enough. The large fits perfectly. Removing the All-Star Magnesium mask is quick and easy, the skull cap stays in place. I used a Wilson FX2 helmet previously and this is by far more comfortable to wear. It's been a rainy season so I like keeping the cap on to keep your head drier.

Joseph C.

Chalfont, PA

May 30, 2022
Had to replace my previous batting helmet with the All-Star Cobalt umpire scull cap. Large a little too tight, XL is a little big but with the UMPLIFE Ice Cap works nicely. Stays on very well with taking the mask on and off frequently. Makes for a good combo with a traditional mask.

Earle M.


May 19, 2022
I think it’s worth every penny. Got hit the first night boy was I glad I had it on!!

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Questions About This Product

Q: When I pull my mask over the top of the helmet the back strap of the Force 3 mask has a tendency to ride up the smooth surface of the skull cap & becomes a loose fit real fast. Several times I've had to keep it from coming off by holding with my hand. It's not safe nor effective to call pitches this way. Any suggestions or remedies to keep the mask secure on the slick surface on the back of the skull cap? Thank you.
– Peter Leonetti

We suggest installing a harness made from a more tacky material than the nylon straps of the Force3 Universal Umpire Mask Harness. The All-Star Delta Flex Umpire Mask Harness is the best solution. This harness was designed by All-Star with a tacky neoprene surface to grip their Cobalt Skull Cap. The UMPLIFE V2 Flex Umpire Harness is also a neoprene based harness in a traditional shape. Either of these harnesses will secure better to the skull cap surface.

– Hunter Fry
Buyer, Customer Service Specialist, Former Basketball Referee

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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.