The Kilpi WILLIE-J is a children's functional T-shirt with long sleeves and a stand-up collar. It is an ideal base layer for sports or outdoor activities. The material with the OPTI-DRY function wicks sweat and moisture away from the skin, is pleasantly warm, quick-drying and sufficiently flexible. Flat seams are gentle on the skin and do not irritate. We offer the Kilpi WILLIE-J in several modern color combinations for girls and boys. Material composition: 92% polyester, 8% elastane