Cheapest I've found is on Amazon
http://www.amazon.co.uk/Beet-It-Conc...7853511&sr=1-1
Works out at £1.39/day... I don't use it the whole time, just in the week leading up to an important race.
Cheapest I've found is on Amazon
http://www.amazon.co.uk/Beet-It-Conc...7853511&sr=1-1
Works out at £1.39/day... I don't use it the whole time, just in the week leading up to an important race.