ARCH FIT: patented Skechers Arch Fit insole system with podiatrist-certified arch support, engineered with 20 years of data and 120,000 unweighted foot scans SKECHERS Air-cooled memory foam (cushioned insole): provides pressure relief, instant comfort and breathability; the cushion conforms to most foot shapes; helps wick moisture (sweat); gel-infused, high-rebound memory foam Athletic activities: walking, light jogging, treadmill, workouts, training, gym, lifting, multisport exercise; They can be worn all year round (winter, summer, autumn, spring); Machine washable - easy to clean.