Gel 100 Mix BoxThis is the Gel 100 Mix Box for athletes to explore how caffeine fits into their fuel plan or prefer fueling with a variety of Gels when training or racing. Each box includes 4x Gel 100 and 2x Gel 100 Caf 100 a complete marathon fuel plan. Each sachet encapsulates 25 grams of carbohydrates in patented Hydrogel Technology. Plus 100 mg of caffeine in Gel 100 Caf 100. Maurten Gel has a unique structure firm, not a syrup which makes it easy to consume