The 9,120sqm structure, erected in Hyde Park, stood 20m tall. More than 15,000 competitors assembled in the structure before the 26-mile power-walk through the night.
A special feature of the event was that all participants had to wear decorated bras. Walk the Walk Worldwide founder and organiser Nina Barough said: "I jokingly said to De Boer chief executive Koos Tesselaar that it would be really nice to have a giant tent in our corporate colours but I never dreamt for a moment that he would go away and create one for us."
De Boer has applied to the Guinness World Records for the structure to be recognised as the world's largest travelling tent.
De Boer sales manager Kate Hunter said: "I think it's fair to say that London's Royal Parks have probably never seen anything quite like the Pink Galaxy."
She added: "We're proud to be a supplier to the Playtex Moonwalk and were delighted to be able to create an entire structure in the bright pink corporate colour of the event's organiser Walk the Walk."
Bordeaux-based textile specialist VSO designed and built the structure on De Boer's behalf.