The ASICS Novablast 4 running shoe is a great choice if you want a shoe with extra bounce. Lighter and with more energy return than the previous version, it's designed to help you run faster. And it will leave you feeling energized every step of the way. It's no surprise that it's the preferred training shoe among athletes. The shoe's FF BLAST™ ECO PLUS foam creates a softer, more energized running experience and provides extra bounce thanks to its trampoline-inspired outsole. Its unique design and fit and higher midsole will give you added energy return during your run. What gives the NOVABLAST™ 4 running shoe extra bounce? Full-length FF BLAST™ ECO PLUS foam creates a softer and more energized running experience. Trampoline-inspired outsole design provides more bounce. High midsole and unique geometric design ensure extra energy return