Britain's Prince Harry is to spend 24 hours in a cold chamber in preparation for his South Pole trek.
The flame-haired royal and four members of his team will endure temperatures reaching minus 40C during which they will take on several challenges, such as cooking meals, skiing for two hours, erecting and taking down their tent, while they will also be blasted with blizzard conditions.
Harry and his group will face the freeze from September 16 to 17 in Warwickshire, south west England, ahead of their 208-mile trek to the South Pole in November.
The prince will join three teams of wounded servicemen and women in a race to the iconic location, during which they will aim to do an average of 10 miles a day for three weeks.
The groups will spend 12 hours skiing and take 10-minute rest breaks every two hours, with setting up camp expected to take two hours.
Singer Ellie Goulding recently praised Harry for his involvement with the Walking with the Wounded South Pole Allied Challenge.
She said: "What he's doing is brilliant, but I can barely find the time to go to the gym right now."