100% cotton knit french terry overalls. The fabric is a inbetween weight ( heavier than tshirts/leggings but lighter than sweaters) perfect for this style. The crotch opens completely for easy nappy changes in this baby version and closes with snap studs. The size 1 does not have an opening gusset and has wood buttons on the straps ( see last photo of this style on child ) There is elastic accross the back for fit and the straps cross at the back so that they dont slip off the shoulders when being worn but can be easily pulled down for changing. Our signature KOOKABURRA applicae is on the front in a patchwork of different prints.