"Keeps kids? feet warm in the winter, cool in the summer. It?s no wonder they become their favorite for year-round wear. Superior moisture and temperature control. Cut for a child?s foot. Best of all, they?re guaranteed not to itch or shrink. Top: 3 x 1 rib with lycra holds the sock up and in place. Combined with light density padding, it assures an ultra-soft, comfortable and snug fit. Arch Brace: Knit with lycra for increased support and comfort. Sole: Medium density cushion protects against shock, blisters and abrasions. 90% SmartWool. 10% stretch nylon."