How to create the perfect bounce in five steps. Step 1: Add bubbles. Steps 2–5: See step 1. This is pretty much the line of thinking we followed when trying to craft a shoe that offered the optimal level of spring and support, and we infused the midsole of these shoes with compression-moulded EVA and thermoplastic polyurethane bubble technology for cushioning and rebound. The mesh upper adds extra comfort and breathability, while the carbon rubber outsole can stop you in your tracks with its top-notch grip qualities.