Comms kit takes to the Alps for ultramarathons 
Published: 08 Sep 2008 12:56 BST
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The Ultra-Trail du Mont Blanc is one of the toughest ultramarathons in the world.
The trail, 166km long, takes runners up and down for a total distance of 9.4km. Starting and finishing in Chamonix, France, the race also passes through Switzerland and Italy. A maximum of 46 hours is allowed for completion.
The race's primary sponsor this year was sports-equipment company The North Face, with other sponsors including Garmin and Alcatel-Lucent.
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