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Black Diamond Half Dome Helmet

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Our Take 

A well-designed helmet should be put on... and then forgotten. You can be wearing a helmet for 10-12 hours at a time while climbing, so comfort is almost as important as safety. The Black Diamond Half Dome checks both those boxes. 

Now redesigned, the helmet features a new lower profile suspension system with a one-handed dial combined with streamlined headlamp clips for added comfort and simplicity. Finally, an updated chin strap adds more efficiency and security while on the rock. The Half Dome is an all-purpose workhorse ideal for everything from trad cragging to alpine expeditions.

Why is this a Guide Pick?
Peter Whittaker

Peter Whittaker

A climbing helmet needs to do two things: protect your head and be reasonably comfortable. The Black Diamond Half Dome does both well. It's durable, well ventilated, and the fit system make sure I can put it on and go climbing without thinking about it.

Size Chart

Measure around the largest part of the head-about one inch from the eyebrows.

Small/MediumMedium Large
48-57cm / 19-22.5in55-61.5cm / 22-24in
Product Details


  • EPS impact foam and durable ABS shell
  • Updated, low-profile suspension system
  • Streamlined, lightweight headlamp clips
  • One-handed fit adjustment dial
  • Easily adjustable chin strap


[S/M] 310g (11oz) 

 [M/L] 340g (12oz)

Half Dome Helmet

Half Dome Helmet