We talk to a lot of brands but one we’ve loved for years, may be the one we’ve never talked about at all. They’re a quiet brand and one you really only think about in the moment. But instead of always being in your face, they wield their might and speak directly through their product, and IFYYK, Science in Sport is the goat.

And with that, SiS has been named the Official Performance Fuel & Hydration Partner of the 2026 Nike After Dark Tour — a global series of seven night-running events built primarily for women, hitting Shanghai, Sydney, Mexico City, London, LA, Manila, and Mumbai.

It’s the first time Nike has ever built a co-branded nutrition range with a performance nutrition partner, and it’s SiS getting the call.

Not GU, not RAW, but a quiet, and legendary brand.

The What

SiS will fuel more than 55,000 runners across the tour, with a bespoke SiS x Nike race fuelling pack matched to each runner’s distance and products stationed at fuelling stops along the course. There’s also a dedicated microsite walking runners through exactly how to fuel for their distance — no guesswork required.

The SiS x Nike range breaks down into four pieces:

• Run Hydro+ Electrolyte Sachet — pre-run hydration
• Run Fuel Energy Chew — pre-run energy
• Run Fuel Endurance Energy Gel — every 30 minutes during the run
• Run Recovery Endurance Sachet — post-run recovery

The Recovery Sachet is the most interesting. It’s been built specifically around female physiology, with two versions — one dialed for 10K distances, one for half marathon — each delivering 20g of whey protein for muscle protein synthesis, plus 25g or 40g of carbs to refill glycogen depending on distance.

Both versions add 5g of collagen alongside vitamin C, calcium, and vitamin D for bone health, plus curcumin and pomegranate extract for their antioxidant properties.

While they say, built for women, there’s nothing stopping the rest of us from benefiting too.

Why We GOATED SiS

Like I said. I love SiS gels and shout it from the rooftop. It’s always been my go to for running, Ironman, and 30 hours across Kansas for Unbound Gravel XL.

It’s a water-based formula that goes down easy and sits even easier. It’s not thick, or syrupy and you don’t get that gut bomb feeling. Plus it tastes good, isn’t overpowering and yes, we’ve had every flavor. So if you’re an athlete who wants a gel that’s easy to swallow, give SiS a try.

We have no relationship but cool to see a brand that’s built its reputation on product over marketing land one of the biggest co-branded nutrition partnerships in the sport with one of the legends. Funny how that works sometimes.