When sprayed onto clothing, Soak creates a stain that changes colour in reaction to acidity levels in the user's sweat. Greens and blues represent healthy levels of hydration, while oranges and yellows signal dehydration, providing a visual cue to rehydrate.
The coating offers body-centred feedback that is difficult to capture using other wearable devices. It also gives users visual insight into their own health and wellness.
Reactive colour is becoming increasingly apparent in technical textiles, particularly sportswear. For further inspiration on transformative hues that change in relation to the surrounding environment, see our report Responsive Pigments.