Bunting Birds 'Tweet Dreams' Shortie Pyjamas. all-over Butning Birds print to the shorts applique image to the t-shirt super combed baby rib for extra comfort designed to fit snugly for safety and warmth. composition: 100% natural cotton. If you haven't bought Hatley pjs before you'll find a size guide attached as an image. If in doubt we advise going up one (or even two) sizes.