Fast-wicking cool-weather baselayer with versatile room-to-grow construction and Galdiodor natural order control. Grow-fit feature with adjustable side snaps on onesie allows for 1 1/2" more growing room. Extended self-fabric cuffs and leg openings roll down as baby grows> Bottoms have an elasticized waistband and expanded back gusset for more diaper room and mobiltiy.