Western Chief Thomas the Tank Engine raincoat is made with colorful waterproof polyurethane. Thomas the Tank Engine will keep your child dry on those rainy wet days. Western Chief Kids Thomas the Tank Engine raincoat sizing is: 2=2T, 3=3T, 4=4T, 5=4/5, 6=5/6, and 7=6/6X. Thomas can help your child get through the puddles with ease.