Bowbear Kids Fun and Playtime Moon with Stars Pajama Set Not flame resistant, for safety reasons pajamas should fit snugly. Tagless label to protect your childs delicate skin. Size 18-24 months: weight 27-30 lbs, height 31-33 inches; 3-4 years: weight 33-40 lbs, height 36-42 inches; 6-7 years: weight 46-58 lbs, height 45-51 inches. Made out of cotton. Stitched design on the top for optimal quality.