Bought these for my husband to train for running and he wore them around the block and didn't like them but waited to long to return. Would like to get a tiny portion of my. money back. TRAIN NATURAL: The Primus Lite Knit is a barefoot training sneaker that creates superhuman feet. Minimal design for unparalleled natural movement, enhanced regenerative materials for pure peace of mind. The best-selling Vivo of all time, but better. Train natural, and set your feet free. ACTIVE OUTSOLE: The Active Sole offers the most sensory underfoot experience, providing ultimate grip and durability on hard surfaces in urban environments. The signature 4mm thin sole puts the minimum material between your feet and the ground. RECYCLED MATERIALS: Made from recycled materials, reusing post-consumer plastic waste, helping to reduce our waste to landfill. SUSTAINABLE: Remade with more sustainable materials that have reduced the impact this footwear has on the planet