Bose Sleepbuds II ($249) are an investment, but those who've bought the ear plugs say they "haven't slept this well in a while." Per the description, Bose uses clinically-proven "innovative noise-masking technology" to diminish unwanted night-time sounds. The ear plus work in tandem with a Bose app that includes 50 relaxing sounds that are designed to help you stay in a deep slumber throughout the night.