Set of two pairs. Features: These socks prevent heavy legs even after a long day of work that puts a strain on your feet. Two-fit construction cushions the impact on your feet. 70% of people who suffer from foot fatigue have experienced the effects. Uses: For workers who feel foot fatigue (e.g., warehouse, transportation, general factory, civil engineering and construction workers). For improving the working environment of workers who wear safety shoes. As tabi socks. Note: These socks are designed for left and right feet. Please wear the sock marked "L" on the left foot and "R" on the right foot. Product Specifications: Specifications/Standards: Two-fit construction to reduce foot strain Sole Fit Construction: Supports the arches of the feet on the left and right sides to prevent the collapse of the plantar arch. (Patent: Patent No. 5021416) Ankle Fit Construction: Supports the ankles and heels to reduce heel wobble upon landing. Color: Black Size (cm): 26-28 Material: Polyester, nylon, polyurethane Color: Black系 (Black-based) Condition: No stains, tears, or odors.