Any ideas on what is best to wear for trousers? I usually wear jeans, but they become uncomfortable (too hot) when I sleep on the long haul flights.

For tops, I usually wear a tshirt and sweater combo, which helps keep me neither too hot nor too cold.

The jeans, sweater and tshirt are all wrinkle free, which is quite important to me, so I don't emerge from the flight looking like.......well looking like I just emerged from a 12 hr flight.