07 Jan '12, 10am

Getting a new helmet? Here are some things to look for in a helmet.

Getting a new helmet? Here are some things to look for in a helmet.

Usually made of fibreglass or thermoplastic, the shell is the first line of defence against a crash. More expensive helmets commonly use carbon fibre or Kevlar. They're lighter and reduce fatigue. IMPACT-ABSORBING FOAM Unchanged after almost 40 years of helmet production. Foam is widely used to cushion your head from impact. Fresh ideas include the use of foam of differing densities, thermoplastic or suspension. INNER-LINER AND PADDING The padding gives your helmet that snug feel. Most are given an anti-bacterial treatment and can be removed for washing. Change them periodically to ensure optimum fit. RETENTION SYSTEM Keeps helmet secured to your head. Some use simple D-ring systems where the strap is tightened via rings. Others use ratchet-style fasteners. Most helmets have a three to five-year shelf life. Beyond that, the glue bonding the impact foam to the shell becomes...

Full article: http://cars.st701.com/resources/index.php?c=article&aid=3...

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