Swiftwick Aspire 4 inch Color:Black For endurance workouts

For endurance workouts

Enables more natural motion

Upper: Breathable Engineered Mesh

Overview Bring your next ultra to the next level with a lightweight design specific for ultra running

Swiftwick Aspire 4 inch Color:Black For endurance workoutsThe ASPIRE Line is thin and light for serious runners and cyclists, yet still perfect for athletes of any sport. Our Managed Compression prevents bunching and hot spots by supporting all 3 arches in the foot. Our Linked Toe technology prevents blisters by eliminating bunching in the toe box. Our socks are knitted at 200 needles, the highest youll find in socks. The higher the needle, the tighter the knit. This high gauge construction produces a