The stickers are made from high quality vinyl and it's 100% water resistant. It will stay on your motorcycle within years, it doesn't matter where, or how you ride. It was tested for many kilometres.
The shipping cost is included in the price. It will be send to you by post on the next working day. Keep in mind that usually it takes 3-4 days to receive it (Europe). It could takes up to two weeks for the rest of the world.
Note: When you make the payment, do not forget to write your names and full address (in Gumroad system).