3. Protected your speaker in place with packing material. You may use packing peanuts, bubble wrap, or other smooth materials to protected your speaker in position. This will enable to prevent it from shifting around during the flight and detrimental other goods in your bag. The Ultimate Ears Wonderboom https://www.bluetoothspeaker.top/portable-home-theatre-system-woofer-sport-speaker-double-bluetooth-speakers/