Forever Haptics.
100% Plastic-free.
100% Toxic-free.

No Plastic.
More Future.

RSTTR climbing holds are made from SandCore, a unique blend of mineral aggregates and bio-based binders—entirely free from plastics and fossil raw materials. The result is a material that harnesses the strength of natural resources without compromising performance or durability.


SandCore is based on renewable materials, and produced using natural fillers sourced from Central Europe. It’s an alternative that not only feels better but is also better for the planet.

Natural Material. Real Performance.

RSTTR holds are engineered to maintain a consistently natural grip throughout their entire lifespan — inspired by real sandstone.

  • Sandstone feeling

  • Naturally grippy — like real sandstone

  • Impossible to polish: stays grippy forever

  • 100% fossil-free SandCore

With SandCore, we combine material innovation and tactile quality — for climbing holds that feel good, permanently.

Lean Production.
Local Manufacturing.

RSTTR is produced in Switzerland — with short supply chains, clean processes, and clear environmental standards.

  • Manufactured in an ISO 9001 and ISO 14001 certified facility

  • Free from toxic substances

  • Local production with a focus on resource efficiency

  • Reduced transport distances thanks to Central European material sourcing

Every hold is made under conditions that protect both people and the environment.

Long-Lasting Products for a Long-Lasting Environment.

By combining mineral components with bio-based binders, we create climbing holds that are extremely robust, dimensionally stable, and long-lasting.

Their unpolishable surface not only extends performance but also reduces replacement cycles — a real benefit for gyms, route setters, and the environment.

RSTTR stands for materials that last longer, feel better, and consume fewer resources.

Check out the holds

Our Partners in
Science & Engineering

Researching the perfect grip.

Prof. Dr. Henrik Surberg

OST Ostschweizer Fachhochschule Buchs

Revolutionizing the mould.

Prof. Daniel Omidvarkarjan

OST Ostschweizer Fachhochschule Rapperswil

Closing the circle.

Nico Pfändler

ZHAW Circular Economy Lab

Want to know more about plastic-free holds?
Reach out to our holds expert.

Andreas Trunz

andreas@rsttr.com

Frequently Asked Questions

  • We offer a range of solutions designed to meet your needs—whether you're just getting started or scaling something bigger. Everything is tailored to help you move forward with clarity and confidence.

  • Getting started is simple. Reach out through our contact form or schedule a call—we’ll walk you through the next steps and answer any questions along the way.

  • We combine a thoughtful, human-centered approach with clear communication and reliable results. It’s not just what we do—it’s how we do it that sets us apart.

  • You can reach us anytime via our contact page or email. We aim to respond quickly—usually within one business day.

  • We offer flexible pricing based on project type and complexity. After an initial conversation, we’ll provide a transparent quote with no hidden costs.

  • Collaborative, honest, and straightforward. We're here to guide the process, bring ideas to the table, and keep things moving.