You go in through one hole, you come out through three holes. Once you're inside you're ready to go outside, but once you're outside you're still inside. What is it?

YOU ARE READING
Riddles
RandomThis is just going to be a book a riddles. I'll also make an answer book. When someone comments the right answer or when a reasonable time has past, I'll put the answer in it. The person who gets it right, I might leave a comment or vote for one of...
Inside or Out?
You go in through one hole, you come out through three holes. Once you're inside you're ready to go outside, but once you're outside you're still inside. What is it?