adidas Women's Ultraboost 21 Running Shoe (Black/Black/Violet)

I only wore these a few times inside on my desk walking pad. They have never been worn outside. They are fine just not my favorite. From website: 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.