Denim&Flowers little boy plaid flannel..sz 5/6. NWT

An unusual plaid flannel shirt. SZ 5/6. FRONT BUTTON SHIRT ..long sleeves..pic shows one rolled up for variation. From the front it's standard..until you see the back which has a unique white circular design..cannot recall the name of it.A conversation starter to be sure. if anyone knows the back design name..lmk! Your little guy will love having this distinctive shirt. have 2 same size.