Britain’s Prince Harry spent a night in a giant freezer, to prepare himself for a race to the South Pole in November.

He will be doing the 15-day trek with a team of wounded British soldiers.

His team will compete against teams from the United States and the Commonwealth.

This week, the 29-year-old prince spent a day and nearly a whole night in the cold chamber, with the occasional 10-minute break.

AP reported that when asked what the worst part of his chilling experience was, the prince said, “Going in.”