Share the same high performance of your lightweight, Double Layer design socks with your kids! Kids&'; feet stay dry, cool and friction free. Let your little ones run, bike, or hike in the world&';s best no-blister kids socks ever! Four sizes in most colors and styles. X-Small Fits Shoe Size: 6-8.5 Small Fits Shoe Size: 9-11.5 Medium Fits Shoe Size: 12-2.5 Large Fits Shoe Size: 3-6 OUR KIDS BLISTER-FREE SOCK FEATURES Mesh panel for enhanced air flow and cooler feet. Recycled Polyester fibers improve moisture management and increased durability Stabilizer Zone(TM) in arch locks sock in place. Blister-Free socks - No Blisters, Guaranteed! BLISTER-FREE RUNNING SOCKS FIBER CONTENT These anti-blister kids socks are composed mostly of eco-friendly Recycled Polyester. Recycled Polyester materials are made from recycled plastic bottles, helping your child enjoy blister-free running adventures while protecting the ground beneath their feet.Inner Layer: 70% Recycled Polyester, 26% Nylon, 4% LycraA(R)Outer Layer: 71% Recycled Polyester, 24% Nylon, 5% LycraA(R) ANTI-BLISTER KIDS SOCK SIZING GUIDE Finding the right fit for your kids is essential for blister prevention! You can view our sizing chart below. We invite you to contact us for any additional information or head to our FAQ page to find the answers to common customer questions. As an American-made, family-owned business, we thank you for choosing Wrightsock anti-blister kids socks.