- Age 20-40 years inclusive BMI 18-25 Non-smoking history and no current use for a minimum of 6 months No smokeless tobacco products (including e-cigarettes) for a minimum of 6 months No sleep snoring reported by subject and by bedroom "companion" Self-described as active/athletic (i.e. regular hikes, walks, jogging, running, active Sports, such as volleyball, soccer, etc.) Self-described as healthy, with no known disease or recent illness Self-completed Epworth Sleepiness Scale of <6 (Johns, MW, A new method for Measuring daytime sleepiness: the Epworth Sleepiness Scale; SLEEP 14:450-5, 1991). Physical Examination Mallampati Score of Class 1 (Nuckton, TJ, et al: Physical