Gently used adidas Women's Ultraboost 21 Running Shoe size 5.5. They run alittle big fit like a women’s 6/6.5. Over all great condition, see photos showing worn spots on the inside inner ankle area. Super bouncy adidas womens Running Shoes The adidas brand has a long history and deep-rooted connection with sport. Everything we do is rooted in sport. Description These women's Ultraboost shoes are designed to give runners the comfort and responsiveness they need. An adidas Primeknit upper is stretchy and has a sock-like fit. A Linear Energy Push system increases forefoot and midfoot stiffness. The S-curve heel eliminates slip, and the signature Boost cushioning returns energy to your stride.