They told him he'd never do it, they told him he'd die trying. But Sean proved them all wrong by becoming the first person to swim from Lands End to John O'Groats.
Click here to watch a great video by The Guardian newspaper.
Sean and his support team used Upano Waterproof Duffels and other Aquapac bags to protect their kit during this long and arduous attempt.
Click here for more about Sean Conway.