The $279 Ozlo Sleepbuds 2 are designed for the second option. Developed by former Bose engineers, these tiny sleep-focused earbuds mask snoring, traffic, hotel noise, barking dogs, and other overnight disturbances without relying on active noise cancellation. Ozlo says the Sleepbuds 2 are the smallest earbuds designed specifically for sleep. A physical button on the Smart Case provides phone-free access to basic functions, including starting a stored sleep sound and snoozing the alarm. The earbuds monitor movement and breathing, while sensors in the Smart Case measure bedroom sound, light, and temperature.