It's practically instinctive, the desire to bundle up a baby in layers of soft clothing to keep it warm. Actually, many people believe that babies are more sensitive to cold than adults, it simply isn't true. Your baby's sleepwear should never be thicker than the clothes you would wear in the same condition.
Stay away from those ribbons and drawstrings: Cute as they may look in the movies, satin ribbons, or even cotton drawstrings can be a potential hazard. Your baby might just get caught in them and even choke. Avoid baby sleepwear with all the frills and laces and opt. for the simple ones.
One thing you do want to look for in sleepwear, however, is a nice snug fit. Keep in mind, though, that snug doesn't mean tight or constricting. Nor should your baby's sleepwear fit too loosely.
Body temperature: Pay attention to the body temperature of your baby. Are her feet and hands cold? If yes, then she may be need another layer of clothing. If her extremities are clammy from sweat, then you need to reduce some of her clothing.
It's important to realize that babies tend to get overheated quickly, and as a result this can be very hazardous. Keeping the temperature of the room between 68 and 70 degrees will be comfortable for the baby, and of course, dressing her accordingly will keep her body temperature in check.
Generally, people use blankets to cover your baby, but there is another choice for sleep sacks.
These can be worn over regular pajamas, and they fit snugly enough around the baby's feet, wrists, and neck.
Your baby sleepwear comes down to using cotton and being snug yet comfortable. Stay away from the frills, and be careful not to over dress.