Warm and cozy pajamas, made of soft and tight flannel (100% cotton). Pants with a soft elastic band and a long-sleeve shirt in Japanese style. We removed all the buttons and zips - everything that can interfere with a baby's comfortable sleep. The shirt is elongated it is convenient to tuck it into the pants, and not to worry about the fact that child's back or stomach will be opened during his sleep. A little bit sized up due to relaxed fit.