NYLON+PU upper with nylex lining ;The size is very accurate.
INSOLE LENGTH: 13 M US Kid：208mm; 1 M US Kid:216.5mm; 2 M US Kid:225mm; 3 M US Kid:233.5mm;4 M US Kid:242mm
Minus 10F Temperature rated & BREATHABLE: The soft shaft fully wraps your little one s calf, delivering a snug fit while protecting tender little toes from unfriendly attack of cold air. High-density plush lining cuddles little toes gently and naturally wicks away moisture for a warm and dry interior, allowing them to enjoy any winter adventures to their hearts content.
WATERPROOF SHELL: When it's raining or snowing, get the kids to wear the boots without fear that the rain will soak their feet
Skid resistant outsole: suitable for cold weather winter days,great for activities like camping hiking running playing sledding ski trip