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One of the most important safety devices in Formula One racing is the driver's helmet. Although its fundamental shape may look very similar to those worn by drivers in the 1980s and even the 1970s, the underlying design and construction technology has changed radically over the years.

As late as 1985 a typical Formula One helmet weighed around 2kg. That amount increased dramatically under high-G cornering or deceleration, adding to the risk of 'whiplash' type injuries in big accidents. As head and neck trauma has been identified as the greatest single risk of injury to race drivers, helmet manufacturers place the greatest importance on reducing the mass of helmets, while increasing their strength and resistance to impacts.

Current Formula One helmets are massively strong, and also considerably lighter, now weighing approximately 1.25 kg. Helmets are constructed from several separate layers, offering a combination of strength and flexibility (vital to absorb the force of large impacts). The outer shell has two layers, typically fibre-reinforced resin over carbon fibre. Under that comes a layer formed of vastly strong plastic, the same material used in many bullet-proof vests. Then there is a softer, deformable layer made from a plastic based on polystyrene, covered with the flame-proof material used in racing overalls and gloves.

The visor will be made of a special clear polycarbonate, combining excellent impact protection with flame resistance and excellent visibility. Most drivers use tinted visors, the insides of which are coated with anti-fogging chemicals to prevent them misting up, particularly in wet conditions. Several transparent tear-off strips are attached to the outside. As the visor picks up dirt during the course of the race, the driver can remove these to clear his vision.

In recent seasons the actual shape of helmets has gradually evolved, as more aerodynamically efficient shapes are brought into use. Sitting directly below the main engine air intake, helmets are increasingly shaped to assist in the process of reducing drag in this notoriously high-turbulence aerodynamic area. The modern designs also reduce the lift produced by more traditionally shaped helmets - which can be anything up to 15 kg at racing speeds.

The helmet design must also provide ventilation for the driver. This is achieved through the use of various small air intakes. To prevent small particles of track debris entering the helmet these intakes are equipped with special filters.

Despite the cutting edge materials used in their construction Formula One helmets are still painted by hand, an incredibly skilled job requiring hundreds of hours of work for more complicated patterns and designs. And most drivers will go through several helmets during the course of a season.

The FIA has currently commissioned work for the development of a next generation 'super helmet' for Formula One racing, intended to improve safety standards still further, especially in conjunction with the now mandatory use of the HANS (Head And Neck Support) system.

Helmets - the helmet of Heikki Kovalainen (FIN) Renault R27. Formula One World Championship, Rd 1, Australian Grand Prix, Practice Day, Albert Park, Melbourne, Australia, Friday 16 March 2007. World © Sutton Helmets - Jenson Button (GBR) Honda F1 Racing adjusts his helmet. Formula One Testing, Jerez, Spain, 19 January 2006. World © Patching/Sutton