For me it didn't fall out,the earplugs are actually similar to apple 's, you can also use the cord clip to clip it on the clothes on the back neck to avoid easy-fall off. Of course, the earmuffs in the accessories are as well a good choice. hope this helps you.
The picun headphone built in HD microphone, ensure clearer voice For talking. The volume is adjusted as you like, the highest volume can get very loud, suitable for use in noisy environments. But we don't recommend that you play the maximum volume for a long time, which will damage your hearing.
These are a great pair of headphones, especially for the price. They fit perfet and do not agrivate my ears. The sound quality is good, they stay place during running and jumping and battery life so far is awesome.
You can't use this to connect to in-flight entertainment system, however as the seller said, you can use this to connect to your mobile device in flight mode. Just turn the Bluetooth on on your mobile device with cellular antenna off.