Swiftwick Aspire 4 inch Color:Black Delivering a high-strength dose of

Delivering a high-strength dose of vitamin C (1000 mg)

the mesh-like fabric structure guarantees good air circulation in your running shoes

blisters and painfully raw skin

Sprint to the finish in a lightweight

For endurance workouts

Swiftwick Aspire 4 inch Color:Black Delivering a high-strength dose ofThe 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