When he was trying to potty train his grandson he had trouble getting his underwear up and down. They're lighter and feel more comfortable on him than sweatpants or other types of underwear we've tried. The company warned you might need a size up, so we bought a size that sounded like it was too big, but it fit well. My grandson is two years old and will be three years old in three months. Size 4 to 5 fit him.
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