While designing his first collection for Canada Goose, the designer Haider Ackermann stumbled upon an image in the brand’s archives that stopped him dead in his tracks. It was a photograph of the Canadian climber Laurie Skreslet, who scaled Mount Everest in the 1980s while wearing a fluorescent pink parka. “It is so beautiful,” Ackermann says. “The story goes that Canada Goose was supposed to make a coat for him, so he asked his daughter, who was around five, ‘What color should it…

