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Kask Protone Review

A pricy Italian semi-aero helmet that falls short on comfort and adjustability
Kask Protone
Photo: Kask
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Price:  $300 List | $197.10 at Amazon
Compare prices at 2 resellers
Pros:  Durable, leather chin strap
Cons:  Expensive, adjustment issues, not comfortable
Manufacturer:   Kask
By Nick Bruckbauer ⋅ Senior Review Editor  ⋅  May 7, 2020
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64
OVERALL
SCORE


RANKED
#11 of 15
  • Comfort - 20% 5
  • Adjustability - 15% 5
  • Weight - 15% 9
  • Style - 15% 6
  • Ventilation - 20% 5
  • Durability - 15% 9

Our Verdict

The Kask Protone is a semi-aerodynamic helmet that is best suited for road racing and high-intensity training. Kask is an Italian company well known for making high-quality products and Team Sky, one of the most successful professional cycling teams in the Pro Peloton, uses Kask helmets. This lid is designed to provide good ventilation while maintaining an aerodynamic profile and is undoubtedly a sharp-looking, durable helmet. Unfortunately, it was hampered by comfort and adjustability issues during testing, keeping it out of range of our top awards winners. Riders looking for a sweet-looking Italian design with reasonable riding performance will appreciate this contender.

Compare to Similar Products

 
Kask Protone
This Product
Kask Protone
Awards  Editors' Choice Award Editors' Choice Award  Best Buy Award 
Price $197.10 at Amazon
Compare at 2 sellers
$171.96 at Competitive Cyclist
Compare at 2 sellers
$180.00 at Amazon
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$299.95 at Amazon$71.96 at Competitive Cyclist
Compare at 3 sellers
Overall Score Sort Icon
64
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Star Rating
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Pros Durable, leather chin strapWell-ventilated, adjustable and comfortable, sleek and classy styleLightweight, comfortable, low profile, good ventilationGreat ventilation, elegant style, advanced MIPS liner designComfortable, adjustable, durable, inexpensive
Cons Expensive, adjustment issues, not comfortableSlightly heavy for a high-end helmetExpensiveExpensive, heavier than other high-end helmetsHeavier, slightly less ventilation
Bottom Line Far from budget friendly, this high quality model is durable, yet lacking in comfort and adjustabilityA stylish, comfortable helmet with outstanding ventilation and solid all-around performanceLightweight comfort and performance from a semi aerodynamic model that ventilates wellA unique MIPS liner design with great ventilation highlight this expensive choiceTremendous value packed into a helmet with a multitude of high-end features
Rating Categories Kask Protone Bell Z20 MIPS Giro Synthe MIPS Giro Aether MIPS Giro Agilis MIPS
Comfort (20%)
5
9
9
7
9
Adjustability (15%)
5
8
8
9
9
Weight (15%)
9
6
8
7
6
Style (15%)
6
9
8
7
5
Ventilation (20%)
5
8
7
8
5
Durability (15%)
9
7
7
8
9
Specs Kask Protone Bell Z20 MIPS Giro Synthe MIPS Giro Aether MIPS Giro Agilis MIPS
Weight (grams) 268 g (size M) 336 g (size L) 312 g (size L) 330 g (size L) 336 g (size L)
MIPS No Yes Yes Yes Yes
Number of vents 20 18 19 11 32
Sizes S, M, L S, M, L S, M, L S, M, L S, M, L
Size Range (cm) 52-58 cm (size M) 58-62 cm (size L) 59-63 cm (size L) 59-63 cm (size L) 59-63 cm (size L)

Our Analysis and Test Results

The Kask Protone stands out for its durable, lightweight construction and comfortable design, but ultimately struggles because of a poor for and aft adjustment mechanism on the headband.

Performance Comparison


Out putting in the miles of testing.
Out putting in the miles of testing.
Photo: Curtis Smith

Comfort


We expected the Protone to be one of the more comfortable models in the test following our past experience with Kask products. Regrettably, that not the case. The main issue we experienced is a fore and aft adjustment system that does not lock in place, allowing the helmet to shift forward and backward while on the head. The headband strap system also has a bend near the temples that creates uncomfortable pressure points. Despite these complaints, this model does have very plush Coolmax padding, and a very comfortable leather chinstrap.

This model has a leather chin strap, a nice upgrade from other...
This model has a leather chin strap, a nice upgrade from other competitors.
Photo: Curtis Smith

Adjustability


This model scores poorly due to a fore and aft adjustment mechanism that does not stay in place. Just touching the Protone while riding can cause it to shift forward or backward. In addition, it does not have an adjustable Y-buckles like many other high scoring competitors. The lack of adjustable Y-buckles made getting the straps evenly tensioned impossible for some of our testers. The rear straps have fixed anchor points, further limiting adjustability.

This helmet suffered from comfort and adjustability issues during...
This helmet suffered from comfort and adjustability issues during testing.
Photo: Curtis Smith

Weight


The Protone has a competitive weight of 268 grams in a size Medium, but there are other similar models in the same weight class that also include a MIPS liner. When you take the durable construction of the product into account, the weight is actually quite reasonable for a semi-aero helmet.

Style


This is a nice looking helmet with some aerodynamic benefits. Several vents up front give it an almost traditional look, but from the side, the aerodynamic intentions are apparent, with a rounded top section free of vents. The Protone lacks rubber sunglass grippers found on other high-end models. We like the leather chin strap, and our testers found it to be very comfortable on the skin. The design is solid, except for the oft mentioned fore and aft adjustment system, which does not stay in place.

Showing this helmet's fit with POC Do Blade sunglasses.
Showing this helmet's fit with POC Do Blade sunglasses.
Photo: Curtis Smith

Ventilation


Overall, ventilation is adequate but falls short of other high-end performers in this metric. Many other models have upwards of 30 vents compared to 20 on the Protone. Other contenders also have more substantial headband suspension systems that maintain a few millimeters of space between the head and the EPS foam liner. Internal channeling is quite extensive on this model, which helps with ventilation at higher speeds. The extra heat build-up is most noticeable at lower speeds when compared to the higher scoring models in this metric.

This lid has plenty of vents on the front.
This lid has plenty of vents on the front.
Photo: Curtis Smith

Durability


The Protone is one of the most durable helmets that we tested. A polycarbonate shell protects the foam from damage. Though more of an aesthetic issue, it scores lower than a few competitors due to flimsy stickers that easily scratch and peel, compared to more durable painted-on decals. Also, the failure of the fore and aft adjustment system cost this model, deducting some points in the durability category.

A full wrap polycarbonate shell enhances the durability.
A full wrap polycarbonate shell enhances the durability.
Photo: Curtis Smith

Value


While this is a nice looking and well-ventilated helmet, we do not feel that it is a good value due to the poor design of the fore and aft adjustment system on the headband.

Showing the front view.
Showing the front view.
Photo: Curtis Smith

Conclusion


The Protone is a nice looking semi-aero helmet, but it suffers from poor adjustability and a lack of comfort.

Nick Bruckbauer