Remove before flight is a safety warning often seen on removable aircraft and spacecraft components, typically in the form of a red ribbon, to indicate that a device, such as a protective cover or a pin to prevent the movement of mechanical parts, is only used when the aircraft is on the ground (parked or taxiing).
This patch turns Alpha's signature red Remove Before Flight tag into a special patch as part of. Use this patch to help customize your MA-1 Flex Flight Jacket.
The "Remove Before Flight" tags are used to make pulling keys out of. They come on Alpha Industries Bomber Jackets which are back in style .
I personally would remove it. The other day I saw two people both wearing AI bomber jackets with the tag on and they looked a bit silly together.