Two years ago, Bose released a unique pair of true wireless ear buds whose sole purpose was to help you sleep better at night. It was the first product of its kind, so it integrated a number of things that might not work for everyone. Well, the outfit took the feedback about that original model and refined it in the form of the Bose Sleepbuds II.

The second generation of the sleep-assisting wearable, the ear buds come in a more compact size than its predecessor, making it comfortable to wear even for side sleepers, many of whom found the original design a bit too intrusive. 
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https://www.coolthings.com/bose-sleepbuds-ii-sleep-assisting-true-wireless-ear-buds/