Swiftwick Aspire Sock Four (Crew) Type_Bra Knit-in ventilation adds zoned cooling

Knit-in ventilation adds zoned cooling

Exaggerated curved hem helps keep you covered as you run

Ergonomic shape of the hem helps keep you covered as you move

Moisture Management - antimicrobial materials designed to wick away moisture without the use of chemicals

To be worn inside shoes to help prevent sore heels

Swiftwick Aspire Sock Four (Crew) Type_Bra Knit-in ventilation adds zoned coolingSwiftwick Aspire 200 running socks feature: Managed Compression proven to reduce swelling, improve circulation and increase endurance Sculptured Footbed and Seamless Toe assuring maximum comfort and a blister free sock even for the most sensitive feet Moisture Management antimicrobial materials designed to wick away moisture without the use of chemicals 200 needle construction for longer lasting and better fit. Four height is Crew length.