Each Septo bandage is built with a carefully engineered, multilayer design that balances protection, breathability, and sensitivity.

The outer O₂-breathable protective layer shields the wound from external contaminants while allowing airflow to support healing. Beneath it, a pressure-sensitive acrylic adhesive ensures secure placement without irritation. The core indicator fabric hosts our reactive pigment technology, shifting color in response to early biochemical changes associated with infection. Below, a nonadherent absorption layer manages exudate without disturbing tissue regeneration, and a release liner maintains sterility and integrity until application.

Together, these layers create a responsive, patient-centered system designed to detect problems before they surface.

At the heart of Septo’s responsive design is its use of anthocyanins, a family of plant-based pigments that naturally react to their surroundings. Found in sources like blueberries, red cabbage, and beets, these compounds give many plants their deep reds and purples while also responding to small shifts in pH and oxygen levels—two early signs of infection.

Under normal healing conditions, the wound environment stays slightly acidic, keeping the pigment a vivid magenta. As bacterial activity increases, the pH rises toward 7.5 or higher, causing the pigment’s molecular ring structure to rearrange. This subtle chemical shift changes how light is absorbed and reflected, turning the color a dark purple—a visible signal that the wound’s chemistry is beginning to shift.

To make this natural reaction reliable, the pigment is paired with stabilizing polymers within the indicator fabric, preventing fading while preserving sensitivity. Drawing inspiration from the resilience of plant roots, Septo’s design channels that same natural intelligence, transforming the way wounds communicate. Each color shift is a signal from the surface, bringing the body’s invisible chemistry into view.