Alpina Sports // Website
Road cyclist with Alpina visor helmet Altona

Highperformance material Koroyd

Koroyd is an extremely stable and lightweight honeycomb structure, which is made up of a multitude of connected tubes. They are composed of two layers. The inner core is formed by thin cells, which are thermally welded via a second outer layer. In the event of impact, the system absorbs the energy and flattens. It is a high-performance material that can be cut, CNC-milled or laminated for any shape. Due to the stable design of the small tubes, Koroyd also allows for much larger openings in the helmet surface, which guarantee excellent ventilation. The small Koroyd tubes create a capillary effect, wicking moisture and heat outside, away from the head.

Graphic of Alpina visor helmet Altona

All about Koroyd!

Graphic of koroyd technology

Active Safety

Koroyd’s patented technology consists of a unique welded tube structure engineered to progressively deform on impact and uniformly absorb more kinetic energy than traditional protection materials.

Graphic of koroyd technology

Superior Cooling

Chaotic air surrounding a helmet at speed is drawn through Koroyd’s open cell structure and delivered in a uniform, constant flow ensuring more efficient cooling and allowing the wearer to keep a cool head even in the most intense conditions.

Graphic of koroyd technology

Light as air

Koroyd’s unique design features the world’s thinnest walled tubes to achieve a structure which is 95% air, resulting in a class-leading lightweight core with enhanced comfort.

Alpina x Koroyd

Koroyd is a material used by Alpina to make a new urban helmet – the Alpina Altona. The light, shock-absorbing green rods are found in all designs of the visor helmet and ensure optimal ventilation. The koroyd is covered by an adjustable outer shell, which allows ventilation to be regulated.

product shot of Alpina visor helmet Altona VM

229,95 € RRP

product shot of Alpina visor helmet Altona M

179,95 € RRP

Fahrradfahrer in der Stadt Alpina Altona Urban Helm

Highperformance material Koroyd

Koroyd is an extremely stable and lightweight honeycomb structure, which is made up of a multitude of connected tubes. They are composed of two layers. The inner core is formed by thin cells, which are thermally welded via a second outer layer. In the event of impact, the system absorbs the energy and flattens. It is a high-performance material that can be cut, CNC-milled or laminated for any shape. Due to the stable design of the small tubes, Koroyd also allows for much larger openings in the helmet surface, which guarantee excellent ventilation. The small Koroyd tubes create a capillary effect, wicking moisture and heat outside, away from the head.

Graphic of Alpina visor helmet Altona

All about Koroyd!

Graphic of koroyd technology

Active Safety

Koroyd’s patented technology consists of a unique welded tube structure engineered to progressively deform on impact and uniformly absorb more kinetic energy than traditional protection materials.

Graphic of koroyd technology

Superior Cooling

Chaotic air surrounding a helmet at speed is drawn through Koroyd’s open cell structure and delivered in a uniform, constant flow ensuring more efficient cooling and allowing the wearer to keep a cool head even in the most intense conditions.

Graphic of koroyd technology

Light as air

Koroyd’s unique design features the world’s thinnest walled tubes to achieve a structure which is 95% air, resulting in a class-leading lightweight core with enhanced comfort.

Alpina x Koroyd

Koroyd is a material used by Alpina to make a new urban helmet – the Alpina Altona. The light, shock-absorbing green rods are found in all designs of the visor helmet and ensure optimal ventilation. The koroyd is covered by an adjustable outer shell, which allows ventilation to be regulated.

product shot of Alpina visor helmet Altona VM

229,95 € RRP

product shot of Alpina visor helmet Altona M

179,95 € RRP

Road cyclist with Alpina visor helmet Altona
Road cyclist with Alpina visor helmet Altona

Highperformance material Koroyd

Koroyd is an extremely stable and lightweight honeycomb structure, which is made up of a multitude of connected tubes. They are composed of two layers. The inner core is formed by thin cells, which are thermally welded via a second outer layer. In the event of impact, the system absorbs the energy and flattens. It's a high-performance material that can be cut, CNC-milled or laminated for any shape. Due to the stable design of the small tubes, Koroyd also allows for much larger openings in the helmet surface, which guarantee excellent ventilation. The small tubes create a capillary effect, wicking moisture and heat outside, away from the head.

Graphic of Alpina visor helmet Altona

All about Koroyd!

Graphic of koroyd technology

Active Safety

Koroyd’s patented technology consists of a unique welded tube structure engineered to progressively deform on impact and uniformly absorb more kinetic energy than traditional protection materials.

Graphic of koroyd technology

Superior Cooling

Chaotic air surrounding a helmet at speed is drawn through Koroyd’s open cell structure and delivered in a uniform, constant flow ensuring more efficient cooling and allowing the wearer to keep a cool head even in the most intense conditions.

Graphic of koroyd technology

Light as air

Koroyd’s unique design features the world’s thinnest walled tubes to achieve a structure which is 95% air, resulting in a class-leading lightweight core with enhanced comfort.

Alpina x Koroyd

Koroyd is a material used by Alpina to make a new urban helmet – the Alpina Altona. The light, shock-absorbing green rods are found in all designs of the visor helmet and ensure optimal ventilation. The koroyd is covered by an adjustable outer shell, which allows ventilation to be regulated.

product shot of Alpina visor helmet Altona VM

229,95 € RRP

product shot of Alpina visor helmet Altona M

179,95 € RRP

product shot of Alpina visor helmet Altona VM

229,95 € RRP

product shot of Alpina visor helmet Altona M

179,95 € RRP

Choose a language