This is a good set and suitable for winter but the tag has been cut off so I don't know what the material is. It can be polyester, viscose or other synthetic materials, but not cotton.
Thermajane Girl's Cozy and Comfy Thermal Underwear Long Johns Set with Fleece Lining
46 Review
C9 Champion Girls Supersoft Bright Girls' Clothing and Active
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Hollhoff Gymnastics Playgrounds Shorts - Breathable Clothing for Girls
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Pack Athletic Performance Basketball Drawstring Girls' Clothing
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π Glamulice Princess Wedding Dress: Embroidered Flower Sparkle Tulle Birthday Party Gown for Girls
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Castle Fairy Pageant Wedding Communion Girls' Clothing for Dresses
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Amazon Brand Sleeveless Unicorns Metallic Girls' Clothing in Dresses
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UNACOO 2 Pack Sleeveless Cotton Dresses Girls' Clothing
62 Review