SiS Half Marathon Endurance Fuel Bundle (Assorted Flavours)

The SiS Half Marathon Endurance Fuel Bundle is a Racepack-curated 6-piece set that combines SiS race fuel with hydration support and two Skratch add-ons for flexible half-marathon fuelling.

Flavour selection: SiS GO Isotonic Energy Gels, SiS HYDRO+ Electrolyte Drink Mix and Skratch Energy Bar are supplied in random flavours according to available stock. SiS BETA Fuel + Nootropics is fixed as Apple. Skratch Labs Hydration Sport Drink Mix is fixed as Lemon + Lime.

Why use SiS for a half marathon?

SiS helps half-marathon runners fuel in a practical way. The GO Isotonic gels give you quick carbohydrate in an easy-to-take format that does not require extra water, while BETA Fuel + Nootropics gives you a higher-carbohydrate option with caffeine for tougher efforts. HYDRO+ adds a separate electrolyte sachet, so you can support hydration without relying on only one fuel format.

• Fast energy during the race: SiS GO Isotonic Energy Gels provide 22g of carbohydrate per gel.
• Easy to take on the move: the isotonic formula is designed to be consumed without extra water.
• Higher-carb option for tougher efforts: SiS BETA Fuel + Nootropics provides 40g of dual-source carbohydrate.
• Extra support when fatigue builds: BETA Fuel + Nootropics also provides 200mg caffeine plus nootropic ingredients.
• Hydration support: SiS HYDRO+ and Skratch Lemon + Lime help support fluid and electrolyte intake.
• Solid fuel option: the Skratch Energy Bar gives you a food-style option if you prefer something more chewable before running.

What You Receive

How to Use the Bundle

There is no single fixed order you must follow. Use the bundle according to your pace, expected finish time, how much fuel you normally tolerate, and what you have already tested in training. You do not need to consume every item in one race.

Before the Race

SiS HYDRO+ can be mixed with 500ml water before the start if you want electrolyte support without extra carbohydrate.

Skratch Energy Bar can be used as an optional pre-race solid fuel if you prefer food rather than another gel before running.

Main Fuel During the Race

2 x SiS GO Isotonic Energy Gels provide your main portable carbohydrate fuel. Each gel supplies 22g carbohydrate and is designed to be taken without extra water, which is one of the key reasons runners use SiS for half-marathon fuelling.

Longer / Harder Effort

SiS BETA Fuel + Nootropics is the step-up option in the bundle. It provides 40g dual-source carbohydrate, 200mg caffeine, 250mg citicoline, 1g L-taurine and 200mg L-theanine. This makes it useful when you want a higher-carbohydrate option and a stronger mental lift later in a harder session or race.

Important: because this gel contains 200mg caffeine, keep total caffeine intake in mind. Science in Sport advises a maximum of one BETA Fuel + Nootropics gel per day.

Hydration

Skratch Labs Lemon + Lime Hydration Sport Drink Mix can be mixed with approximately 350–500ml water. It provides 19g carbohydrate and 400mg sodium, making it a practical drink-based hydration option before or during a session.

Nutrition Guide (Per Serving)

SiS GO Isotonic Energy Gels, SiS HYDRO+ and Skratch Energy Bar are supplied in assorted flavours, so exact flavour-specific nutrition can vary. Always check the individual product packaging supplied if precise flavour nutrition, ingredients or allergen details are important to you.

Shop SiS Separately

Prefer to build your own SiS fuelling plan? Shop SiS BETA Fuel + Nootropics Energy Gel, SiS GO Isotonic Energy Gels, SiS HYDRO+ Electrolyte Drink Mix, browse the Science in Sport collection, compare Energy Gels or explore Electrolytes & Hydration.

Buy the SiS Half Marathon Endurance Fuel Bundle in Singapore

Buy the SiS Half Marathon Endurance Fuel Bundle from Racepack.sg in Singapore for a practical mix of isotonic gels, higher-carb caffeinated fuel, electrolyte support and optional solid fuel for half-marathon training and race day.

Frequently Asked Questions

What is included in the SiS Half Marathon Endurance Fuel Bundle?

You receive 1 × SiS BETA Fuel + Nootropics Energy Gel (Apple), 2 × SiS GO Isotonic Energy Gels, 1 × SiS HYDRO+ Electrolyte Drink Mix, 1 × Skratch Energy Bar and 1 × Skratch Labs Lemon + Lime Hydration Sport Drink Mix.

Are the flavours fixed?

No. SiS GO Isotonic Energy Gels, SiS HYDRO+ and Skratch Energy Bar are supplied in random flavours according to available stock. SiS BETA Fuel + Nootropics is fixed as Apple, and Skratch Hydration Sport Drink Mix is fixed as Lemon + Lime.

How does SiS help in a half marathon?

SiS helps by giving runners easy-to-carry carbohydrate fuel during the race, a higher-carbohydrate option for tougher efforts, and a separate electrolyte option for hydration support. The GO Isotonic gels are especially useful because they are designed to be taken without extra water.

Does the bundle contain caffeine?

Yes. The bundle contains 200mg caffeine from the fixed SiS BETA Fuel + Nootropics gel. Always account for caffeine from coffee, other gels, drinks and supplements in your total intake.

Do I need to use every item in one half marathon?

No. This is a flexible bundle. Use the products according to your race duration, hydration needs, caffeine tolerance and the fuelling strategy you have already tested in training.