# Cores

Designed by shapers. Sustainably printed.

High-performance cores—ready to glass.

[Start Shaping](/content/pages/workflow/index.html)

## What is a SwellCycle Core?

Swellcycle cores are 3D-printed using plant-based thermoplastic made from renewable sources like corn starch or sugar cane to create a lightweight, high-strength internal structure. Designed for performance and shaped for sustainability, our cores are printed directly from your design file and are ready for glassing—no CNC and finish shaping required.

[Our Technology](/content/pages/technology/index.html)

### Precision Fit

Every core matches your shape, millimeter-perfect.

### Fast Turnaround

From file to core in days.

### Less Mess

No need to cut, shape, or sand.

### Sustainable Tech

Made from responsible material, designed for circularity.

## How It Works

You create your design. We print your custom core using responsible material and our unique inner lattice structure. You glass it—or let us glass it for you.

[See the Full Workflow](/content/pages/workflow/index.html)

## Shaper Testimonials

> ★★★★★  
> The boards feel solid, responsive, and surprisingly close to traditional PU, but with a sustainable edge. As a shaper, it gives me precision, consistency, and freedom to keep creating.  
>  
> Pol Riera  
> Spina Surfboards

[Meet the Shapers](/content/pages/shapers/index.html)