Tailwind Endurance Fuel is the drink mix ultra runners ask for by name. It mixes clear with water and gives you calories, electrolytes and hydration in one bottle, so there's nothing to chew, nothing sticky in your pocket, and nothing your stomach will complain about at mile 20. Pour, shake, go. Pick up a single stickpack to try a flavour, or the 50-serving pouch if you already know you love it. Available online and in the shop on Broad Street, Stamford, where we're happy to talk you through how much to use for the distance you're doing.