The Nike Free Run+ 3 Running Shoe for Women in Wolf Grey/Electric Green offers a barefoot-like ride while still offering slight cushioning, traction and underfoot protection of a traditional running shoe. It's low-profile midsole doubles as an outsole, dramatically reducing overall weight making Nike Frees different than traditional athletic shoes. They're designed to let your feet move more freely and naturally, which means your muscles will be doing a bit more work than demanded of them in some other athletic shoes. Nike encourages you to get used to them gradually for a safer, more effective and more enjoyable experience.