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Crag Sender Climbing Helmet

4.833333333333333 out of 5 stars
30 Reviews


Size Chart


Crag Sender Climbing Helmet

Mammut's Crag Sender Collection consists of climbing gear specialized for modern climbing at sport crags, and the Crag Sender Climbing Helmet is lighter and more performance-oriented than most of Mammut's helmets for all-around climbing. It utilizes a hard shell for lightness and reliable durability, and EPS foam adds impact protection. You can adjust the fit with a dial that's easy to use even while climbing, and there's an adjustable chin strap and additional cushioning to ensure a snug fit.


  • Mammut's lighter climbing helmets specialized for sending at crags
  • Hardshell backed by EPS foam and Kevlar reinforcements
  • Large ventilation openings with integrated air channels
  • Headlamp attachment
  • Aerial wheel adjustment system and additional cushioning ensure a snug fit
  • Item #MAMU51X
CE EN 12492
Fit Adjustment
chin strap
12 vents
Manufacturer Warranty
2 years
Claimed Weight
Shell Material

Overall Rating

5 based on 30 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 0 reviews
3 Stars - 0 reviews
4 Stars - 5 reviews
5 Stars - 25 reviews

What do you think about this product?


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5 out of 5 stars

March 1, 2024

I don't even notice I'm wearing the helmet when I'm climbing, which means it's perfect. It is lightweight, the straps sit perfectly, and it is easy to adjust. This is my favorite climbing helmet

Beth T

Originally reviewed on

5 out of 5 stars

February 22, 2024

Light, Comfortable, makes me feel safe

Definitely the most comfortable climbing helmet I've tried. When climbing it feels like there's nothing on my head. Love the color and the straps overall fit well too. Not too much else that can get better with this helmet!

Originally reviewed on

5 out of 5 stars

February 14, 2024

Very good.

This helmet is light and comfortable enough that you forget you're wearing it. It's easy to adjust to fit and the padding on the inside is nice. The vents in the top help is breathe well in warmer weather.

Tayler S

Originally reviewed on

4 out of 5 stars

February 1, 2024

Lightweight helmet

Excellent helmet overall. It's lightweight and easy to adjust. My only negative is that the straps can be uncomfortable around the ears after all day. This won't be an issue for everyone though.

Zachary G

Originally reviewed on

5 out of 5 stars

January 10, 2024

Lightweight and great!

This is my second one of these helmets (first one smashed off the top of a cliff). They are breathable, lightweight and the fit is solid!

Originally reviewed on

5 out of 5 stars

January 4, 2024


I like how light yet solid this feels. And I hope I never have to find out if it works.

Randall L

Originally reviewed on

5 out of 5 stars

November 7, 2023

Lightweight and breathable

This helmet is awesome. It's lightweight but still offers decent protection for the breathability and weight. It's basically a thin plastic shell over a foam interior. I get that it's for weight but the plastic seems more delicate than other similarly constructed helmets. The plastic also marks easy which is weird. The webbing can take a bit of time to adjust so it doesn't run over your ears but it's really not that difficult. Overall, a really well-made helmet. This is up there with other lightweight foam constructions.

Originally reviewed on

4 out of 5 stars

November 3, 2023

It's a pretty comfortable helmet that's light and easily adjustable. The only MINOR thing that I thought was less than optimal was that the plastic bracket at the back (the wheel adjustment system) will ride up into the helmet when I put it on, and I have to remember to pull it back down after I put the helmet on.

Originally reviewed on

5 out of 5 stars

October 28, 2023

Light and Easy to Wear All Day

This is a great helmet choice for long days at the crag as well as long trekking days with lose rock.

Al L

Originally reviewed on

5 out of 5 stars

October 3, 2023

Comfortable and light helmet, only complaint is the color, but that's just a matter of personal taste.

Originally reviewed on