Silicone breast pads are an auxiliary product commonly used in the medical or sports fields to protect the chest from injury or increase comfort. Whether silicone breast pads can be brought on board a plane depends mainly on their size, weight and whether they contain any materials restricted by aviation regulations.

Generally speaking, when flying, passengers have certain size and weight restrictions on their carry-on luggage. Silicone breast pads can be brought onto the plane if their size and weight are within the airline's regulations and do not contain any prohibited components. Passengers can put it in their carry-on bag or luggage and take it into the cabin after passing security check.

However, if the size or weight of the silicone breast pad is larger than the airline's regulations, or it contains some special ingredients such as lithium batteries, it may need to be checked in accordance with the airline's requirements. In this case, passengers should consult airline staff during check-in for specific checked baggage regulations and requirements.

In addition, in order to ensure that silicone breast pads can be successfully brought onto the plane, passengers also need to pay attention to the following points:

1. Understand the airline’s baggage regulations and security inspection requirements in advance to ensure that the silicone breast pad meets the carrying requirements.
2. When going through security check, if necessary, you can explain the purpose and nature of silicone breast pads to the security personnel to avoid misunderstandings or delays.
3. Silicone breast pads should be placed in an easily accessible location for easy inspection during security check.
4. If you have special needs or circumstances, such as silicone breast pads that need special storage or use, you can contact the airline in advance to seek help and advice from the staff.

In short, whether silicone breast pads can be brought on board a plane mainly depends on whether their size, weight and composition comply with the airline's regulations. If it meets the carrying requirements, passengers can take it on the plane; if it does not, they can choose to check it in or consult the airline for help. During the carrying process, passengers also need to pay attention to the above points to ensure that the silicone breast pad can be taken on the plane smoothly and arrive at the destination safely.