Our onesies and shirts are made with high quality 100% ring spun interlock cotton for super softness and thickness to wrap your child in comfort! The finished sleeves and neck stitching are details that add to the quality of our shirts and onesies; no "undershirts" here! Our tops have also been double stitched for extra durability. Our onesies and shirts are true to size and have been washed prior to embroidering to remove sizing. The back of the stitches are covered with soft material to protect tender skin.