Zim is a portable electrolyte tablet formulated for endurance athletes. Come in a small tube for on thego hydration. One tablet disolves in 500ml of water to combat fatique, muscle cramps and lactic acid build-up. Each tablet contains an array of nutrients to keep you on the move.

We say: refil with plain old water at the end of a long ride and it ain;t going to do the biz, drop one of these tablets in and you have an instant palatable re-hydration drink just when you need it most.

Price: £5.49