Walk easier, Recover faster, Feel better! Same design as the Running Socks but the Walking product has a lower compression profile to effectively deliver the right amount of compression. iPS integrated power system with: Achilles Tendon Support: Additional support of the Achilles tendon protects and prevents irritable tendons. Padded Foot Soles: The special support of the foot sole prevents irritations caused by pressure spots. Ventilation Channels: For a pleasant foot climate. 3-D Fit: The socks adjust to the anatomy of the foot for a perfect fit thanks to the three-dimensional manufacturing process. Right and Left Anatomical Design. Silver Ions for odor and anti-bacterial properties. Size III IV V Calf Circumference 12.5" - 15" 15.5" - 17.5" 18" - 20"