2 layers. Fabric: external layer in ultra-resistant shiny fabric, inner layer in cotton. Elastic knit: arm bellows, inner collar, lumbar insert, breathable inserts on shoulders and inside leg. Sizes: 38/60 Children’s sizes. Homologation: CIK-FIA 2001/23/level 2 Norma 2001-1 Regulation Colours: KK01712147XX blue/black/white KK01712176XX black/red/white