2-piece set. Cotton jersey t-shirt with astronaut dog bag design and long sleeves. Look at the end of the process, that means it's the same. The waist is both elastic and has a drawstring. The cuffs are elastic. All Denokids products are designed with child safety in mind and have passed through needle detectors. Top: 92% Cotton 8% Elastane Bottom: 60% Cotton 40% Polyester