Are Groundies non-slip? February 28, 2025 13:37 Yes, they are! Our soles are made of light TPU, which combines special slip resistance and maximum flexibility. Even on smooth and wet surfaces, Groundies gives you a firm hold, so you are always protected, no matter the weather. Related articles Are Groundies waterproof? What materials are used for Groundies? What are the differences between the various soles? Where are Groundies produced? What is so special about the Groundies soles?