Prototype fit: regular technical base layer. Final grading confirmed at bulk production.
The T-shirt is designed as a technical first layer: soft enough for daily wear, but built around a dedicated S04 silver shielding layer across the covered torso area.
Its declared attenuation belongs to the textile under laboratory conditions. Final product claims remain gated by independent EU testing, because fit, coverage, seams, and movement all matter in real use.
The construction pairs a pure silver inner shielding face with a cotton outer architecture so the garment feels familiar while the material system remains measurable.