Polar Feet Kids' Non-slip Fleece Socks An all-purpose sock for outdoors, hiking, skiing, playing or paired with their favourite rain or winter boots. Mid-weight polyester fleece sewn with flat-lock seams is super comfortable and keeps moisture away from sensitive skin. Our non-slip socks have little grippy paws on the soles for great traction on smooth surfaces. S fits kids approx 1.5-2 years old. Shoe size 5-6. S fits kids approx 2-3 years old. Shoe size 7-8. M fits kids approx 3-5 years old. Shoe size 9-10. L fits kids approx 6-7 years old. Shoe size 11-13. XL fits kids approx 8+ years. Shoe size 1-3. Made in Canada!