It's decent cotton, not thick, not thin and knee deep to 5'4". I haven't dried them on top of knee socks when there can be some shrinkage under the knee socks ;) I've dried them on medium heat and they are with no real shrinkage dried.
Merino Wool Hiking Socks for 𧦠Kids - Pack of 3 by MERIWOOL
60 Review
Warm and Soft Wool Socks for Kids - Cute Animal Design, Thick Thermal Crew Socks for Children and Toddlers in Winter
43 Review
Jefferies Socks Little Seamless Organic Girls' Clothing
44 Review
Children Toddler Thermal Cotton Winter Girls' Clothing
58 Review
Eocom Pairs Childrens Winter Animal Girls' Clothing
64 Review
Thermajane Girl's Cozy and Comfy Thermal Underwear Long Johns Set with Fleece Lining
46 Review
Tommy Hilfiger Girls Crop White Girls' Clothing
54 Review
Amazon Essentials Little Short Sleeve Leotard Girls' Clothing for Active
61 Review