A pair of comfy pajamas can help your child get a good night's sleep. Boys' PJs come in one-piece footed versions as well as two-piece sets; the latter feature shorts or pants paired with a long- or short-sleeved top. If your son fights putting on pajamas, choose ones with a superhero or cartoon design that he'll be excited to wear. Generally sized according to years in age, boys' sleepwear also often includes a height and weight guide for proper fit. Check the label to ensure the pajamas are made from flame-retardant materials.