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Originally developed and tested by Swedish neurosurgeon in 2000, it uses a layer between the shell and liner of the helmet that slips upon impact, deflecting some of the force away from the brain by rotating the outer part of the helmet by around a centimetre
There is an ASTM F 1492 Skateboard helmet standard, but most skate helmets now in the US market are certified only to the CPSC bicycle helmet standard
A secure and comfortable fit My head fits easily in the Ballista
Compared to other packs on GearJunkies guide to the Best Daypacks, thats pretty light
1980 saw the introduction of the Schwinn King Sting, based on their popular BMX Sting
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