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New Kask Protone Icon helmet is airier, comfier, more aero and safer

Emma Cole
7 Apr 2022

The update may look subtle but Kask promises better ventilation, ergonomics and aerodynamics; and protection against rotational violence too

Kask has today launched the Protone Icon helmet, a redesigned version of its popular Protone design.

Kask says the new model offers improved ventilation and aerodynamics, but with all the key features of the previous model.

The Protone Icon weighs a claimed 230g in size M, the same as its predecessor, and will cost £245.

The evolution of a classic

The Protone was originally released in 2015, having been developed in partnership with Ineos Grenadiers (then Team Sky). In the time since it has become one of the most popular helmets on the market and is used at all levels of the sport.

Just after it was released, Cyclist reviewed the helmet and awarded it 4.5 stars.

Ineos Grenadiers still predominantly use the Protone despite Kask having released several other designs in the time since, so an update to the model was no doubt welcomed by the WorldTour team.

Despite affording the helmet only minor style updates externally, according to Kask, the helmet’s internal shell structure has been overhauled. The brand says the more aggressive sculpting on the underside of the shell channels air better to creates more ventilation and improved aerodynamics.

Better ergonomics

The Protone Icon maintains largely the same styling, which Kask says is down to the continued using of its ‘seamless’ construction technology, whereby the lower and upper parts of the shell are joined to create a sleek shape.

Kask says the helmet’s adjustment system, Octofit+, has been improved. As a result the brand says a more stable and comfortable fit will be able to be achieved.

Kask says the Protone Icon uses a new retention stabiliser, which the brand says supports a wider area across the nape of the neck to boost balance.

And there is relief for those of us with butter fingers. The helmet’s dial has been enlarged and coated in rubber for better grip, thus making it easier to adjust.

A particular highlight for long-haired cyclists will be that Kask says the Protone Icon remains ponytail-compatible.

Safety first

Of note is that while Kask still doesn’t use any sort of slip-plane liner or mechanism to protect against rotational impact, the brand says the Protone Icon meets its own WG11 standard for rotational impact safety.

The WG11 test focuses on protection from rotational impact forces, measuring rotational kinematics from both oblique and normal impacts.

Essentially, whilst Lazer has introduced KinetiCore, Mips uses slip plane liner technology and Bontrager WaveCel claims to offer protection in a similar manner, Kask says its helmets meet its own safety protocol as-is, with no extra technology required.

Kask Protone Icon options

The Protone Icon is available in S, M and L, which covers head circumferences from 50 to 62 centimetres.

It comes in ten different gloss or matt colours, costs £245 and is available to buy today from

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