New (never worn) Hanna Andersson Insulated Winter Overalls size 12 (150cm).
If you're not familiar with Hanna Andersson, they make very high-quality clothing.
The insulation is Thermolite and the reflective material is Scotchlite.
There are elastic cuffs at the bottom to keep the snow out.
Children, kids, boys, boy, girls, girl, snow, ski pants, pant, bib, bibs, Anderson, Andersen