SoftHeart – Foam-Like TPU Stress Relief Toy

A soft, foam-like heart designed to be squeezed — because sometimes love just needs a little pressure.

This heart isn’t hollow or rubbery.
It uses TPU with a dual-infill approach to behave like real foam — soft, resilient, and evenly compressible in every direction.
Most of the magic happens in the slicer, not in the shape.
 

Printing Instructions

Use the provided print profile as-is.

No supports.

• To adjust softness, change Skeleton infill density:
  • 4–6% → softer, more foam-like
  • 8–10% → balanced feel
  • 12–15% → firmer squeeze

Printed and tested using TPU 95A.
Different TPUs will change the feel — adjust infill accordingly.
  

⚠️ IMPORTANT:
This model must be printed in TPU using the provided print profile.
Printing the STL with standard settings will result in a stiff part.

 Description

This heart was designed to explore what TPU can really do beyond hollow, rubber-like prints — turning a simple shape into something meant to be held, squeezed, and felt.

Instead of relying on thin walls or empty interiors, this model uses a controlled dual-infill approach to behave more like real foam: soft, resilient, and evenly compressible in every direction. The outer structure provides shape and texture, while the internal gyroid skeleton distributes pressure uniformly, creating a satisfying squeeze and smooth recovery.

Most of the “magic” of this model happens in the slicer, not in the CAD. By tuning the skeleton infill density, it’s possible to control how soft or firm the heart feels without changing the model itself. The result is a stress relief object that feels substantial and engineered, not flimsy or air-filled.

The surface texture is a direct result of this process. It isn’t decorative — it reinforces the foam-like behavior and gives the object a fabric-style tactile feel that looks and feels intentional. Up close, it’s clearly 3D printed, without tricks or fake smoothness.

Printed and tested in TPU 95A.
Don’t be fooled by the photos — the heart is larger and firmer than it may appear, especially in smaller hands.

Designed as a simple, print-and-use object: no assembly, no supports, no gimmicks — just squeeze, release, and repeat. A small object, meant to be held, shared, or gifted, especially when a tactile gesture says more than words.