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Black Diamond
Half Dome Helmet

4.571428571428571 out of 5 stars
84 Reviews
Color:Bd Orange


Size Chart


Half Dome Helmet

Hopefully you'll start climbing Half Dome around sunrise, because if you don't you'll definitely finish climbing after sunset. Either way, the Black Diamond Half Dome Helmet has headlamp clips as well as safety features. This helmet is Black Diamond's original, updated for more ventilation and a lower weight.


  • Black Diamond's staple helmet for climbing sport and trad
  • Co-molded foam with low-profile, lightweight polycarbonate shell
  • One-handed adjustment dial with adjustable chin strap
  • Clips for headlamp
  • Item #BLD00Z9
Shell Material
11 vents
Fit Adjustment
Claimed Weight
[small/medium] 11.6oz, [medum/large] 12.3oz
Manufacturer Warranty
1 year

Overall Rating

4.5 based on 84 ratings

Review Summary

1 Stars - 2 reviews
2 Stars - 1 reviews
3 Stars - 5 reviews
4 Stars - 15 reviews
5 Stars - 61 reviews

Fits True To Size

Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.
Runs smallTrue to sizeRuns large

What do you think about this product?


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4 out of 5 stars

January 31, 2024


I guess you can always go lighter and more comfortable, but I often forget its up on my head. It just does the trick. The twist-adjuster is a huge time saver. Though I think that's probably a standard on everything now, IDK.

Peter G

Originally reviewed on

3 out of 5 stars

October 26, 2023

Good basic climbing helmet, with limitations

This is a good basic climbing helmet. I use it primarily as a low-cost search and rescue helmet. I do notice, however, that the cradle easily becomes dislodged from the shell. The helmet also tends to slip some on contact. These are safety concerns, and should be kept in mind while making a purchase decision.

Glendoval S

Originally reviewed on

4 out of 5 stars

September 5, 2023

solid helmet at a fantastic price point

My first climbing helmet was this model. It's great for saving money and protecting the noggin! Not the lightlest, but good for cold days and covering your whole head compared to lighter weight models.

Lena N

Originally reviewed on

5 out of 5 stars

June 27, 2023

Fantastic for the price.

Provides excellent protection, especially at its price point, however it doesn't breathe at all and can be uncomfortable against the forehead. The clips hold a headlamp in place very well and I haven't had a problem with anything shifting. It fits well and stays secure in everything I've put it through.

Timothy R

Originally reviewed on

4 out of 5 stars

May 14, 2023

Great helmet

Not much to it. Great helmet and moderately comfortable. Could use some tweaks in the clip that secures it under your chin, but overall nice helmet.

Zachary C

Originally reviewed on

5 out of 5 stars

April 10, 2023

Durable helmet for travel

I've put it through the wringer
Size Bought:
6' 2"

Durable enough to throw in/on a carry on bag without having to worry. I don’t mind or notice the weight compared to a super lightweight helmet, and am an intermediate level climber.

CL C35
5 out of 5 stars

March 19, 2023

Comfortable and light enough

The helmet fits well and doesn't get in the way. I have used this outdoor rock climbing and tree ascension.

James F

Originally reviewed on

1 out of 5 stars

March 6, 2023

Very unstable due to chinstrap design

The only good thing about this: it's pretty much the only hard-shell climbing-rated helmet that goes to 63cm (critical if you need to wear a balclava or beany *and* have a larger head!). Which is still smaller than I'd like, but Petzl only go to 61cm, and Edelrid to 59cm. The design of the 3-point chinstrap makes it very unstable (especially on larger heads), and the nub on the back makes it impossible to hard mount a light with a battery box. These design choices make it wholly inapropriate for caving (as compared to Petzl's Boreo), and means I'm sticking with my Ecrin Roc.

Eric L

Originally reviewed on

5 out of 5 stars

February 18, 2023

This helmet is just right, heavy duty enough, yet light enough for a full shell helmet. Fits hoods both inside and outside well and doesnt interfere with my sunglasses. Its a winner!

Dylan C

Originally reviewed on

5 out of 5 stars

December 15, 2022

Great Fit

We have a few of these helmets in different sizes, We usually have a few youth groups each year that we want to make sure equipment fits properly, The Black Diamond Half domes seem to have the best size accommodation for different size heads ( and hair for girls) they offer great support and strength for beginners, you cant go wrong with these.

user image
Mark O

Originally reviewed on