Bounce your way through your run with the ASICS Novablast 4. This shoe will put a spring in your step with its bouncy cushioning system, trampoline-inspired outsole and plush, comfortable upper that wraps around your feet. One runner even mentioned this shoe made him smile all run long in our ASICS Novablast 4 review, saying ”it’s got a density to it, but it also feels very energetic and springy.” Details Upper: A breathable woven upper delivers a plush, comfortable fit with plenty of stretch, ventilation and durability. The padded mesh tongue has a wing construction to help make the shoe fit better and reduce any tongue slippage. At least 75% of the shoe’s upper materials are made with recycled materials. Midsole: FF Blast™ Plus Eco cushioning provides plenty of bounce and comfort. It is made with approximately 20% bio-based content for more sustainability. Outsole: The AHAR® outsole is nice and durable. The outsole design was inspired by a trampoline to provide a more responsive bounce as you run.