100% polyamide. Lightweight, waterproof jacket that packs down small, ideal for walking, hiking, camping, festivals and school trips. The seam sealed isolite 5,000 polyamide fabric with a dwr (durable water repellent) finish sheds moisture and breathes. With two handy pockets and a small stuff sack. Regatta kids sizing (chest approx): 2 years (53-55cm), 3-4 years (55-57cm), 5-6 years (59-61cm), 7-8 years (63-67cm), 9-10 years (69-73cm), 11-12 years (75-79cm), 32" (79-83cm), 34" (83-85cm).