With just 215g of weight, Protone has the lowest drag and the fastest heat dissipation coefficients compared to any other ventilated helmet. Thanks to several ventilation holes and a thick padding material, heat and moisture are dissipated very fast, improving comfort and performance without giving up on safety: the top area is reinforced with an internal plastic sub-structure that increases crash protection. Nineteen colors available.
The Protone weighs just 215g and uses a 3D Dry padding with a multi-layer open cell construction process to give a more comfortable ride. It has removable and washable inner padding, made from CoolMax® fabrics and its inner padding fabric has been treated using the Sanitized® antimicrobial process. KASK has also continued to use its Multi In-Moulding Technology to create a polycarbonate cover for the top, base ring and the back of the helmet’s shell. This is joined to the inner polystyrene cap via KASK’s In-Moulding Technology to improve the shell’s shock absorption. Its strengthened frame further reduces the risk of a shock breaking the shell.
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3D dryThe tridimensional 3D DRY padding utilizes a multi-layer open cell construction process: high technology for the best comfort and performance.
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Aero ControlIncredibly aerodynamic and top performing shell, tested in the wind-tunnel and able to provide a really impressive CX rate. Any position the head will assume the outflow of the air will be perfectly in line with the helmet.
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Bag
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CoolmaxRemovable and washable inner padding in Coolmax® material
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ECO ChinstrapChin pad with eco-leather chinstrap The anallergic and washable chinstrap is extremely comfortable and helps to avoid irritation of the skin
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FrameIn case of shock it avoids the break of the helmet into pieces
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M in mouldingThe innovative “ moulding” technology, joining the inner polystyrene cap to the outer polycarbonate one, ensures a better shock absorption.
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MITThe MIT Technology, applied to all KASK cycling helmets, guarantees a higher safety and a complete protection thanks to the polycarbonate layer that covers the shell on the top, on the base ring and on the back.
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OCTO FITRubberised Micro Dial adjuster provides improved finger grip Floating cradle contact points combine internal gel pads for optimum comfort. These supports are designed to oscillate freely through 180° allowing a perfect fit on any shaped head The Skeletal Brackets of the cradle have been designed and refined to provide the best fit and support whilst being as light as possible        
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SanitizedInner padding fabric treated with antibacterial and antimicrobial Sanitized® process.
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VisibilityHigh visibility stickers for maximum safety even in poor visibility conditions
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| Kask size | cm | inch |
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| S | 50 - 56 | 19 11/16 - 22 3/64 |
| M | 52 - 58 | 20 15/32 - 22 53/64 |
| L | 59 - 62 | 23 15/64 - 24 13/32 |
