The best open ear weareable is the Sony Linkbud. Simple design and small.
Some people can't wear it well due to their ear shape but for those that can it is brilliant. I hope the next revision improves the design and also adds wireless charging.
Xiaomi has announced the global launch of new open-ear headphones. The Xiaomi OpenWear Stereo feature large drivers and up to 38.5 hours of playtime, and also support LHDC with up to 96 kHz.