【Warm & Comfy】High-quality merino wool fabric with thicken terry design make it more soft and confortable to wear, firmly locks the heat, keep little feet toasty in winter; OTC design winter socks keep kids' calf warm and provide a better protection, reducing the damage caused by ski boot friction to the calves. 【Stretchy & Breathable】 Made of high stretchy fabric with moderately compressed, helps to stably fit skin; Fast moisture wicking, good air permeability, keep kids' feets dry during winter actives, like skiing, snowborading and ice skating. 【Size Guide】 Please read the size chart before purchase. Our ski sock size covers several stages, ideal for 3-13 years old boy/girl/toddler/youth. XS for ages 3-5, S for ages 6-9, M for ages 10-13. 【Anti-slip Design】: Soft stretchy cuff prevent socks slipping. The stretchy design at the arch and ankle helps the socks fit perfectly, allowing childs move freely with heavy ski boots. Padded toes and heels help you prevent tearing and provide more warmth. 【Perfect Present Choice】 Our ski sock is a perfect present choice for your kids. Let our socks give he/her more warmth & comfy in this winter. Winter is coming! Are you ready to get a happy winter time with your kids