Western Chief Butterfly raincoat is made with colorful waterproof polyurethane. Butterfly will keep your child dry on those rainy wet days. Western Chief Kids Butterfly raincoat sizing is: 2=2T, 3=3T, 4=4T, 5=4/5, 6=5/6, and 7=6/6X. This is a fun way to let your child show the beautiful butterfly they are becoming.