30 Days in Home Use and Home Use Patterns Over 6 Months

This study will build upon a previously approved protocol entitled "A multi-center prospective, blinded, randomized crossover study to compare the Cerêve Sleep System at two different temperatures in primary insomnia patients" (CIP-003; CER1-01-090). In that study, 150 insomnia patients were targeted to be randomized to complete in lab assessments of sleep using the Cerêve Sleep System. In this follow-on study, 36 patients who completed the in lab study will be enrolled to complete 2 phases of in home use of the device. In the first phase, the durability study, 30 patients are targeted to complete additional in lab assessments following 30 days of in home use of the device. In the second phase, the home use pattern study, 24 patients are targeted to complete an additional 5 months of in home use in which their use patterns will be monitored. Hypothesis: EEG sleep latency and sleep efficiency following 30 days in home use of the device at 14-16°C will be similar to those measures after the initial acute, 2-night use in the parent study in the 14-16°C condition. The device will demonstrate a benign safety profile over 6 months in home use.