Review: Shimano Unzen 10 Hydration Pack

It’s not every day that a writer can legitimately say that a company has completely re-thought or revolutionized a certain type of product. Well, they say it all the time… but how often is it really true?
In regards to the Unzen 10 hydration pack from Shimano, I can claim with complete honesty that Shimano has started from scratch and completely rethought the mountain biking hydration pack.