From Hunter, the Kids' Original Matte Waterproof Buckle Strap Rain Boots feature: vulcanized rubber upper handcrafted design made from 28 parts graded leg heights for growing kids lacquer finish pull-on construction textile lining rubber outsole approx. 11" shaft height Imported. BLOOMING: Occasionally, you may notice a white powdery "bloom" on your Hunter rubber wellington boots. This is because rubber is a natural product and in certain conditions, insoluble particles may rise to the surface. This is a common process, characteristic of high quality, natural rubber and nothing to worry about. It will not affect the performance or durability of your boots. A pristine finish and shine can be easily restored with regular use of Hunter Boot Buffer or Instant Boot Shine.