Little Boys Black Suit Complete Outfit with Tie Boys Suits Dresswear Complete Set (Suit Jacket, Vest, White Dress Shirt, dress pants) Made of 100% Polyester All pants sizes come with an elastic waistband in the back so it can expand to a larger waist size. Size 2T-4T only comes with an elastic waistband. Size 5-7 has a button in the front with zippers