damental issue remains even today: You can’t manage what you don’t measure. That is true for endurance athletes tracking caloric expenditure and substrate utilization or weekend warriors just looking to stay
Torhans Aero 20. 22oz water bottle. I just upgraded to this from the clunker of my profile design bottle. Carrying 2 bottles on the back of my tri bike means I was comfortable sizing down to this smaller bottle up front.