Fits small, order one size up; Our boys toddler pajama set is made from buttery-soft bamboo for all-night comfort. Breathable, seasonless fabric keeps kids warm in winter and cool in summer. Runs small; size up if between sizes.; This set consists of a top and bottom.; Snug fit meets all CPSC safety regulations, without the use of flame-retardants or harsh chemicals; WARNING: Not flame resistant. Wear snug-fitting to help keep children safe.; Imported