Vaporfly 4 Width:Regular Breathable FlexWe added Flyknit throughout

Breathable FlexWe added Flyknit throughout the upper

The waistband is designed for comfort on extended runs

flexibility and containment

helping you stay dry and comfortable through all your activities

Bamboo charcoal ionized fibers for durable softness

Vaporfly 4 Width:Regular Breathable FlexWe added Flyknit throughoutA light, efficient design feels propulsive for all 26. 2. The Vaporfly 4 is a lean, mean, mile eating machine. We trimmed weight in the midsole, outsole and upper from the Vaporfly 3 without sacrificing performance. The result is a lighter, more propulsive all around racing shoe thats trusted from the mile to the marathon. Product Details: Full Speed The full length carbon fiber Flyplate has a higher angle than the Vaporfly 3 and combines with a lower