The Kids Core Light Sock is a carbon copy of the adult light model, downsized to suit the ever-moving, energetic feet of the new generation. The Definitive Fit System delivers a snug form fit and includes extra cushioning over the shin area and under the foot. Made from Le Bent's Signature Blend, a luxurious combination of merino wool and rayon from bamboo, the hard part will be getting the kids out of them. Definitive Fit System: Elastics & strategic stitching provide targeted support in all the key areas: Elasticated Instep: To make its secure and snug, no wrinkles or bunching. Ankle Band: Precision fit for those twists and turns all day long. Achilles Support: Extra comfort in this high friction area, also minimizing heel lift. Memory Stretch: Molds to your foot every time you put the socks on. Composition: Rayon from Bamboo - 50%; Merino Wool - 21%; Nylon - 27%; Elastane - 2%