In DK besides aero considerations there are a lot of practical reasons to wear a hydration pack vs bottles. A hydration pack won’t go flying off when you bump over that washout rut that’s at the bottom of so many hills. A frozen water bladder keeps you cool for a while and keeps your hydration cool for longer than frozen bottles. Also…was it 2015 when so many folks picked up the bacteria normally found in bovine colons? Hydration packs are more hygenic. That bacteria was a great weight loss aid but not something I’d want to experience just the same.
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