KASK Protone Helmet

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211.39 27.49 discount
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  • Free tracked delivery to Ireland
  • Trustpilot review 9.4 out of 51.344 reviews

Pros & Cons

  • Lightweight - you almost don't even notice you're wearing it.
  • Good ventilation for such an aerodynamic helmet with 15 ventilation apertures.
  • Leather straps for extra comfort.
  • The upper part is reinforced with an internal plastic substructure, for better fall protection.
  • Thanks to the Octofit adjustment system and divider earband, this helmet can be adjusted very precisely.
  • Kask does not use MIPS, so that extra bit of security is missing.
  • The leather chinstrap takes some cycling trips to feel comfortable.
Read more on what our customers have to say about this product


Brand KASK
Including VisorNo
Ventilation ★★★
Road Helmet Type All-round helmet
Weight 228 grams
Extra protection No


The Kask Protone is the ''do it all'' aero helmet by KASK. The Protone offers the optimal combination of aerodynamics and ventilation. With a weight of just 228 grams this helmet is a lightweight, so much so that you barely notice you're wearing it. The various ventilation openings ensure that heat and moisture are quickly dissipated. This results in optimal comfort and improved performances, without compromising on safety. The upper part of this road bike helmet is reinforced with an internal plastic substructure, so your head is better protected during possible impacts.That bit of extra safety, supplied by for example a MIPS, is lacking in this helmet as Kask does not use the system.

Thanks to its Octofit adjustment system and divider ear straps you can adjust your Protone easily, quickly, and precisely for a perfect fit that never shifts. Its eco-leather strap is very comfortable and prevents irritation to the skin. This strap is washable just like the helmet pads. Both former top team Team Sky's (now Team Ineos) input as well as many months of data-research, have contributed to the development of this helmet.

These features make sure the Protone is the perfect helmet for both professionals and stylish touring riders.

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Delivery includes

- KASK Protone helmet
- Cover for storage
- User's Manual

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Including Visor No No No No
Model Year 2017 / 2018 / 2019 2018 2017 / 2018 / 2019 / 2020 2019 / 2020
Ventilation ★★★ ★★★ ★★☆ ★★★
Road Helmet Type All-round helmet All-round helmet Aero helmet All-round helmet
Helmet Size S / M / L / 50 - 56 cm S / M / L / 51 - 54 cm S / M / L / 51 - 55 cm S / M / L / 51 - 55 cm
Colour Blue Matt / Nero Matt / Nero Matt-Rosso / Nero Rosso / Bianco / Nero White / Black Blue / Brown / Grey / Green / Orange / White / Black / Red Matte Black/Blue Pearl / Matte True Spruce / Matte Bright Red/Dark Red / Matte White/Silver / Matte Black Fade
211.39 152.43 From 152.43 233.75
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Customer photos


9.3 / 10 Average from 158 reviews | Write a review

9.3 / 10

158 reviews


  • Light weight (8)
  • low weight (7)
  • Aero (6)
  • Comfortable (5)


  • Expensive (4)
  • None (2)
  • Could be finished better (1)
  • None at this price! (1)

Most recent reviews

9 / 10

Rob, 28 August 2019

Good looking....fits perfect....Good protection

10 / 10

John, 17 August 2019

Good Helmet

Good helmet that sits well and has plenty of adjustments. Comfortable and doesn’t move about

10 / 10

Paul, 11 August 2019

Super fit

This helmet has a great fit in any direction. It feels a rounder fit than Specialized. Looks superb on. Could be finished with more finesse though.


  • Great fit
  • Looks fantastic
  • Lightweight


  • Could be finished better

10 / 10

David, 7 August 2019


Upgraded from the Mojito, this is in another league. I now get very little sweat running down my glasses, the odd droplet as opposed to the flood I was used to, also the nifty retention feature for the glasses means they no longer move. Supremely comfortable and very light. 100% happy


  • Style
  • Sweat wicking
  • Comfort
  • Weight
  • Quality

8 / 10

Jacek, 3 August 2019

excellent helmet

excellent good looking helmet. expensive


  • overall


  • expensive

All specifications

Detailed product description


ECO Chinstrap
An anti-allergenic and washable chin strap with high levels of comfort. Helps prevent skin irritation.

3D Dry
The padding in this helmet uses 3D-Dry technology, which offers optimal comfort and performance.

Dit verwijst naar de uitneembare en wasbare binnenpadding in Coolmax-materiaal.

In Moulding
This technique connects the inner polystyrene layer to the outer polycarbonate one, together offering more shock absorption.

The MIT technology ensures your head is optimally protected. The polycarbonate layer covers the entire helmet: base, lower ring, and rear.

Octo Fit
The rubber micro dial adjustment system on the helmet can be operated with a single hand. The dial can be turned 180 degrees, allowing you to quickly and easily tune the fit. The Skeletal brackets have been designed to optimally support your head.
The pads have an antibacterial coating designed to prevent any foul smells.

Aero Control
This helmet is fitted with a wind-tunnel tested aerodynamic shell. Whichever way you’re looking, the air exhaust will always be able to do its work.

This refers to the reflective stickers that make you more visible in dark conditions.