Stage 1: Material

This was the first thermochromic fabric we sourced. On paper, it looked promising blue base that would shift with heat. Before assembly, we inspected the material to assess the coating quality and baseline colour accuracy.

Raw thermochromic fabric, unassembled and untested.

Stage 2: Heat test

Once assembled, we applied heat to test the colour changing effect. The shift was visible but weak. The transition lacked the visual impact we needed. It registered as a subtle tint change rather than a bold transformation. Not good enough.

Heat applied to reveal the colour shift, it was noticeable but not striking.

Stage 3: Real world evaluation

We tested it on a dog to assess fit, comfort and how the colour shift performed during actual wear. The harness functioned well structurally but the thermochromic effect didn't deliver the "wow" moment we were chasing.

Why we didn't release it: The colour change was too subtle to justify the concept. The fabric quality also didn't meet our durability standard. If we're releasing something built around transformation, the transformation needs to be undeniable.

Final evaluation: worn by a dog to test real world performance.

What Fuyu taught us

Fuyu confirmed the direction but exposed the gap between concept and execution. The idea of a colour changing harness was right. The material wasn't.

This sample pushed us to source better thermochromic fabric. something with a more dramatic shift, higher durability and a finish that felt premium. That search led directly to the Y1C1 (Henka). Same concept, executed correctly.

Fuyu didn't fail. It refined our standard.

See what made it

Fuyu didn't work, but Y1C1 (Henka) did. Same concept, executed to our standard. Limited to 100 units.

View Y1C1 Harness