The Asics GEL-QUANTUM 90 IV shoe is a versatile choice that blends performance-driven features with street-style sensibilities. The upper features a soft, flexible construction with breathable, no-sew overlays for comfort in any situation. The full-length AMPLIFOAM cushioning system and Scutoid GEL technology keeps you comfortable and agile throughout the day. It's the perfect way to stay in-tune with your world.