Nice thick socks as everyone says but be careful they are very slippery indoors on hard floors. My toddlers have slipped and fallen in it a few times around the house and now I try to undress them when we're inside. They are so thick that they have to be worn with slightly larger shoes. They don't go well with shoes that are otherwise tight.
Amazon Essentials Little Short Sleeve Leotard Girls' Clothing for Active
61 Review
Hollhoff Gymnastics Playgrounds Shorts - Breathable Clothing for Girls
48 Review
Dancina Toddler Leotard Flutter Sleeve Girls' Clothing for Active
55 Review
Thermajane Girl's Cozy and Comfy Thermal Underwear Long Johns Set with Fleece Lining
46 Review