 Premature infants are at risk for complications due to the immaturity of motor, gastrointestinal, respiratory, cutaneous and behavioral systems. Therapeutic positioning is routinely used to provide containment, maintain a flexed position and prevent skeletal deformities and delays in motor development. Premature infants have feeding difficulties and frequently experience gastroesophageal reflux, discomfort, refusal to feed, irritability, and crying. The neonatal intensive care environment can create stress and disrupts sleep-wake cycles and self-regulatory behaviors. Cycling from active to deep sleep states is required for neurosensory processing, learning, memory formation and brain plasticity. Sleep and waking states for premature infants are predictive of neurodevelopmental outcomes. The purpose of the study is to determine whether the use of conformational positioning will be associated with greater total sleep time in premature infants with a history feeding difficulty compared to positioning on a mattress alone. We hypothesize that the number of arousals and total sleep time will be affected by the support surface. Specifically, the number of arousals will be lower and total sleep time will be greater for infants when they are on a conformational positioning CP device compared to when they are on the standard positioning system mattress SP. The use of CP will reduce the number of arousals, increase the total sleep time, and bring about behavioral states that are conducive to regulation of attention, state and motor response relative to SP. 