Excellent condition - worn only 3 times Lightweight and great support APL is always pushing the limits of what’s possible in performance and our newest introduction the Streamline is our purest, most purpose built running shoe to date. A streamline, by definition, is a design that presents very little resistance to a flow of air, increasing speed and ease of movement. To achieve the superior comfort, cushioning and speed that the APL Streamline delivers, we created a completely new midsole and outsole made from our newest compound; APL FutureFoam.