Babies do not require any more layers of clothing than an adult. Dress your baby according to the temperature of his environment. Babies usually only need one more layer of clothing than you do, depending on the time of year. Toweling, cotton, and soft wool feel the best on their skin. Be sure clothing made with synthetic fiber is soft. Check that seams are not stiff or rough. Avoid open weaves as a finger or toe can get caught. Some babies are sensitive to a particular fabric or laundry detergent. Consider this as a possible explanation for skin rashes.