This pajama is very constructed from very thin material.  So thin that even unbuttoning the button at the top of the zipper threatens to rip the bottom part of the button off of the PJ.  I ordered two pairs of these (I have twins) and on one the zipper came completely off of its hinges the first night, I did return that pair.  If you insist on ordering this product, but a size larger than usual because the sizing runs small.