Launched as a crowdfunding campaign and released to the public in 2018, Bose's original Sleepbuds used a combination of noise-isolating tips and ten soothing sounds to help wearers get a solid night of shut-eye. The Sleepbuds II improve on this formula in several notable ways. They're built around a new, more reliable battery that lasts a full night on a single charge. An upgraded Bluetooth LE radio ensures a stable connection, while new materials on the curved body eliminate the dreaded "pillow squeak". Combined with improved passive noise blocking, a more powerful driver, and five new masking sounds, they should make falling — and staying — asleep as easy as ever.