KASK Protone Helmet

Helmet Size
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  • Free tracked delivery
  • Trustpilot review 9.4 out of 30.369 reviews

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  • 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
  • 228 grams
  • 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.

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Find out more on our Blog

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Type of Racing Helmet All-round helmet All-round helmet All-round helmet All-round helmet
Helmet Size S / M / L / 50 - 56 cm S / M / L / 51 - 55 cm S / M / L / 51 - 55 cm S / M / L / 50 - 56 cm
Colour Nero / Bianco / Blue Matt / Nero Lime / Nero Matt / Nero Matt-Rosso Matte Back / Matte Silver Bright Red / Matte Black / White / Fluo Yellow / Matte Black / White / Silver / White / Red Hydrogen White / Navy Black / Garminum Blue / Bohrium Red
Head Circumference 59 - 62 / 52 - 58 / 50 - 56 51 - 55 / 56 - 59 / 60 - 63 60 - 63 / 51 - 55 / 56 - 59 50 - 56 cm / 54 - 60 cm / 56 - 62 cm
Weight 228 grams 234 grams / 215 grams / 264 grams 286 grams 198 grams
MIPS No No Yes No
£159.00 £140.70 From £148.10 £129.95
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9.3 / 10

89 reviews

  • Comfortable (3)
  • weight (3)
  • fit (3)
  • Light weight (3)
  • Quite expensive (1)
  • Shows dirt and marks (1)
  • Horrible leather strap (1)
  • A little expensive (1)

Most recent reviews

Matthew, 19 February 2018

Excellent service

Amazing helmet!! Super lightweight, comfy and looks awesome. Service from Mantel was excellent, they were a lot cheaper than all other sites and delivery to the UK was super fast. Would definitely purchase from them again.

Philip, 21 January 2018

Great kask helmet

Great fitting crash helmet

Duncan, 10 December 2017

best All round helmet available

Great fit, light weight and superb quality

  • Fit
  • Weight
  • Aero
  • Quite expensive
Martin, 7 December 2017

Comfortable to wear and offers great level of protection

  • Lightweight
  • Comfortable
  • Full adjustable
  • Shows dirt and marks
Richard, 6 December 2017

Great helmet with an unlikable strap.

The helmet itself is great, it fits your head very well and is dry adjustable. It has the best dial of any helmet I've used. The only downside is the leather strap. It's not supple enough for one and it's also way too long. I don't want to cut it to size as it kinda ruins resale if I decide to get rid. I've had to tap it our if the way or it just looks rubbish and flaps about taking away the aero advantage the helmet is purported to give. A little disappointing and the only thing that stopped me rating this a 10.

  • Good shape
  • Comfortable
  • Fits your head rather than sits on it.
  • Great tightening dial mechanism
  • Horrible leather strap

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.

Customer Service

020 3695 9922