Party Owls PJs (All Over Print) by Hatley. Hatley's ever-popular classic long sleeved kids Polo Pyjamas! Features include: all-over Party Owls print contrasting cuffs to the hands and feet 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.