Backpack Review: Osprey Men’s Flapjack

I’m a big fan of Osprey backpacks. I only own 2, the Flapjack and the Viper 9. I really see no need to ever own another because between the 2 they do everything I need. I use the Flapjack for an all purpose backpack. The Viper 9 is my hydration pack, a great lightweight day pack. Unless …

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