A simple bag for a simple task- a rider on a long stage will need more fuel to keep up their stamina and so a member of the support team will distribute these ‘snatch and grab’ musettes of food along the way. Sometimes two closures and other times just one; the bag has to be easy to access while riding a bike. The long strap also eases the quick distribution process as shown below (grabs from A Sunday in Hell).
Suggested reading: Archival Review: Cycling Musettes & A Sunday In Hell
cork grips 
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