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KASK Protone Helmet

Model Year
Helmet Size
214.95€ 20.05€ discount
View the stock

  • Free tracked delivery to Ireland
  • Trustpilot review 9.3 out of 46.335 reviews

Pros & Cons

  • Aerodynamic.
  • Good ventilation for an aerodynamic helmet with 15 ventilation apertures.
  • Leather straps for extra comfort.
  • The design puts it between an all-out aero helmet and a highly ventilated helmet.
Read more on what our customers have to say about this product


Brand KASK
Type of Racing Helmet All-round helmet
Weight 228 grams
Extra protection No


The Protone is the ''do it all'' aero helmet by KASK. The Protone offers the optimal combination of aerodynamics and cooling. Thanks to its Octofit adjustment system and divider ear straps you can adjust your Protone easily, quickly, and precisely for a perfect fit. Its eco-leather strap is very comfortable and prevents irritation to the skin. This strap is washable just like the helmet pads. Thanks to these features the Protone is the helmet perfect for both competitive professionals and
stylish touring riders.

Kask didn't just trust on Team Sky's input alone, so they spent a great amount of time on data research, position analysis (how does a rider move on the bike) and thermodynamic studies. For example: what is the best way to put away cycling glasses in the helmet without increasing drag.

Read more

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Model Year 2017 / 2018 2017 / 2018 2019 2017 / 2018 / 2019
Type of Racing Helmet All-round helmet All-round helmet All-round helmet Aero helmet
Helmet Size S / M / L / 50 - 56 cm S / M / L / 51 - 55 cm S / M / L / 51 - 55 cm S / M / L / 51 - 55 cm
Colour Nero / Bianco / Blue Matt / Nero Lime / Nero Matt / Nero Matt-Rosso Bright Red / Matte Black / White / Fluo Yellow / Matte Black / White / Silver / White / Red Matte Bright Red/Dark Red / Matte Black Fade / Matte White/Silver / Matte Black/Blue Pearl Blue / Brown / Grey / Green / Red / White / Black
Weight 228 grams 286 grams 270 grams 258 grams
Extra protection No Yes Yes No
214.95€ 179.95€ 240.95€ 199.95€
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Customer photos


9.3 / 10 Average from 144 reviews | Write a review
9.3 / 10

144 reviews


  • Light weight (7)
  • Aero (6)
  • Comfortable (5)
  • looks (5)


  • Expensive (2)
  • None at this price! (1)
  • Pricier than alternatives but get what you pay for (1)
  • Fragile (1)

Most recent reviews

9 / 10

JEREMY, 9 May 2019

One very comfortable helmet.

Looks, good, feels very comfortable, it seems to be slightly less noisy than the Mojito and I’m very happy. Can’t fault Mantel, they dispatched it almost immediately.


  • Comfort
  • Looks
  • Air flow

10 / 10

Alex, 4 May 2019

Great helmet for an amazing price!


  • Aero
  • Cool
  • Comfortable

10 / 10

Gary, 29 April 2019

One of the best helmets available

Fantastic helmet, offered at an unbeatable price. Has been used for every race in Britain and Belgium since purchase. Comfortable, light, and looks great. What is there not to like.


  • Light
  • Aero
  • Comfortable


  • None at this price!

10 / 10

Andrew, 26 March 2019

Italian style

Kask Protone is the best road helmet you can buy. Great price from Mantel.

9 / 10

Anthony, 13 March 2019

Great fit and look

The Protone is a nice looking, lightweight helmet. I’m a 59cm head size and I ordered the medium initially and although it just about fit it was a little snug on the forehead. No room to wear a cap underneath. Returned for a large and the fit is perfect. The large obviously looks bigger than the medium but not a huge mushroom. Looks pro in white with white Jawbreakers. Great helmet. Best price online from Mantel.


  • Design, looks, lightweight, adjustment

All specifications

Detailed product description


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

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.

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

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

MIT Technology
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.