You put me on your body, and three parts of your body come out. .................. What Am I??

Question

You put me on your body, and three parts of your body come out. Once your inside, you can go outside. But while your outside, your still inside,

What Am I??

Answer 1

When we put cloths on our body three parts of our body come out. Once cloth is inside we can go outside . But while cloth is outside we are still inside . So I am Cloth

Answer 2

May be underwear or pant/jeans :)

Answer 3

One's Clothes.................It can be Pant....Shirt....T-Shirt....Kurta....Underware.............etc