ÖKOTEST has tested the Dux (red) and rated it as "very good."

Whether for leisure, as beach shoes, sandals, or garden work shoes – these shoes are incredibly lightweight, odor-neutral, and free from harmful substances. The material provides unique pressure relief and reduces signs of fatigue. The ventilation holes in the forefoot area ensure high breathability.

Care instructions:
Do not place in direct sunlight. Clean with a soft cloth and dish soap under running water. Not suitable for the dishwasher, dryer, or washing machine.