100% cotton LONG SLEEVE union suit. - reinforced collarette - rib knit cuffs and ankles - retains snug-fitting shape to seal in body heat - reinforced shoulder seams for longer wear - wide overlap - 1-button seat - double thick cuffs - machine wash (cold water) seperately - tumble dry low This garment is larger than you would expect as the fabric is 100% cotton and will shrink when washed for the first time. It was made intentionally larger to fit properly AFTER the first washing.