Thank you for viewing this product. The following is a product description. This recovery shoe brand was developed in 2011 in Cohasset, Massachusetts, by a veteran team of athletes, trainers, and product developers from major shoe manufacturers, taking two and a half years to complete. They noticed that while there were many shoes on the market that emphasized impact, there were none designed for impact absorption and recovery. This led them to create OOFOS®, becoming pioneers in recovery footwear. The special material used in OOFOS® products, OOfoam, unlike the typical EVA midsole designed for forward propulsion, absorbs 37% more impact, reducing the shock to the soles of the feet upon landing. This reduces the burden on the knees, hips, and back. Furthermore, the ergonomically designed footbed gently cradles the foot and provides firm arch support. In the United States, since its launch in 2011, the understanding of recovery footwear has deepened year by year, and by 2017, it had expanded to 1700 stores, mainly running shops. Please check the condition of the product in the photos. After purchasing new, I wore them only 4-5 times last summer. I cleaned them every time I wore them, so there is no dirt on the footbed or thong. Please understand that this is a used item before purchasing.