A kids gilet is a sleeveless insulated body warmer that keeps a child's chest and back warm while leaving both arms completely free to move. Duck Apparel makes gilets for children in South Africa as a middle layer under a coat in deep winter and as a standalone outer layer on mild days. The shape sits close to the body, finishes around the hip, and pulls on over a school shirt or a jumper without adding bulk at the shoulder. Parents usually choose a gilet because a child stays comfortable when the core is warm, and the open armhole never stops them climbing, cycling or writing.