It's hard to find quality thick winter socks for little kids. They are available in different designs and colors for girls and boys. Recommendation: Wash and lay flat to dry, which will prolong the life of the sock.
Amazon Essentials Little Short Sleeve Leotard Girls' Clothing for Active
61 Review
C9 Champion Girls Supersoft Bright Girls' Clothing and Active
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Hollhoff Gymnastics Playgrounds Shorts - Breathable Clothing for Girls
48 Review
Tommy Hilfiger Girls Crop White Girls' Clothing
54 Review