The Nike Free Advantage training shoe features a lightweight, nano-ply constructed upper with laser cut-outs that allow for training specific support, flexibility and breathability. Phylite™ dual-injected midsole provides lightweight cushioning with training specific Nike Free sipes for multi-directional barefoot-like flexibility. Strategically placed rubber pods give training traction on any surface. Removable insole. Wt. 5.8 oz.