Limited Time Only - 7 day starter pack just £12.00

Built with people who use it

K3 was built by athletes for athletes — and the network around it is what makes it work. Coaches who run the system in their practice. Ambassadors who carry the standard into their community. Athletes who hold the line on what hydration can be.

Join the Ambassador program

Become a Partner

What K3 actually is..

K3 is built around HydraTherm™ — a proprietary three-layer hydration system.

The electrolyte layer puts back what sweat takes out. The hydration layer keeps fluid where the body needs it. The gut layer keeps the system absorbing under load while protecting the gut ecosystem. One system. Three settings. Set to the moment of the session.

Inside HydraTherm™

Mechanism, ingredient categories, per-sachet figures and citations available in the For Coaches & Practitioners accordion.

For Coaches

K3 works with sport scientists, strength and conditioning coaches, physiotherapists, nutritionists and team performance staff across HYROX, triathlon, football, cycling, golf, combat sport and endurance racing.

What the K3 coach partner programme provides:

— Product samples for you and your athletes

— Direct access to the K3 founder and formulation team

— Custom dosing protocols for team or individual periodisation

— Discount codes for your athletes and their community

— The full HydraTherm™ research brief and competitive analysis on request

Apply to become a Partner

Read the full HydraTherm™ science

Ambassadors.

The K3 ambassador programme is a four-tier ladder. Every ambassador starts as a Seeder. Performance and engagement move you up. Top-tier Founding Performance Partners share in K3's growth.

Every ambassador starts as a Seeder. The ladder is performance-led — what you put in defines what comes back.

Become an Ambassador

Seeded Athlete

If you compete at national level or above and want to try K3 before committing to the ambassador programme, the seeded athlete route is a low-commitment first step.

What you get: a starter pack of all three SKUs — Loaded, Steady, Reset — plus a brief usage protocol from the K3 team. No content commitment. No commission structure. Just product, science and feedback.

Request to be seeded