Spira Men's Volare III Cushion Sneakers Nylon / EVA A mid to high mileage training shoe for the serious runner looking for a performance shoe that provides excellent long term cushioning front and rear combined with a high level of responsiveness. For runners who are looking for maximum full length cushioning that provides exceptional protection against impact shock and fatigue. Tri-Spring configured WaveSpring cushioning system in both the heel and forefoot resilient EVA. Normal to high arch foot types unless using additional arch supports / custom orthotics. Semi-curved training last.