SIS GO Isotonic Energy Gel (22g Carbs)

You drink this gel rather than eat it. It's thin and liquid, so you can swallow it in one go without chewing. Because it's isotonic, you don't need to wash it down with water. Even with a high heart rate it stays easy to get down.

You notice the difference most in the second half of a race. When you're tired and no longer fancy anything thick or sweet, this gel still goes down easily. Handy on long trails in the Ardennes or on the Veluwe, where there isn't an aid station every kilometre.

Not sure? Look at how many carbs per hour you want to take in. Each gel gives you less than a concentrated gel, so for a high intake you'll need more sachets. That means more space in your vest and more wrappers to carry back.

In short: for runners who want to refuel quickly on the go without water.