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Sierra [sierra.com] has select Shimano Hydration Backpacks on sale from $ 24.99 + Free Shipping when you sign up to receive emails. Alternatively, shipping is $ 5.95 or free on orders $ 89+ w/ promo code SHIP89.[LIST][*]Shimano Rokko 8L Hydration Backpack [sierra.com] $ 24.99[*]Shimano Unzen 2L Hydration Backpack [sierra.com] (black, khaki, or gray) $ 24.99