How about the comfor? Does OWS 2 fall off easily？

Extremely comfort! oladance features a completely Open-Ear design that rests gently and securely on top of your ear. There are no tips, so they’ll never go into your ear. That’s how they deliver superior sound in a natural, comfortable way.

Not easy to fall off. Compared with traditional in-ear earbuds, the oladance uses an innovative ear-hanging design and has been rigorously tested to calculate the most accurate ear fulcrum to achieve a stable and firm wearing feeling. Compared with other open-ear headphones, oladance’s unique behind-the-battery design provides better balance for sports than normal open earphones. On the premise of wearing it for a long time without discomfort, it is the perfect solution for various outdoor sports, such as running, skipping, yoga, and other sports, and keeps it stable on your ears.