The weeks after birth are critical for the health of mothers and premature newborns; the highest rate of infant mortality is usually reported in this period due to neonatal hypothermia associated with morbidity and mortality. Earlier studies have shown the reduction of neonatal hypothermia through the use of simple woolen caps during Kangaroo Mother Care. The study’s results will help us understand the actual effectiveness of the use of these caps, well suited to countries with limited resources.