Inside the large light-grey tent, the children feel at home.
The photos they took on their journeys move between portraiture, close-hand observation and a kind of tentative reportage: young men play cards to while away the time in a camp, two children rest on blankets spread across tarpaulin groundsheets, fires burn next to makeshift tents beneath cold, grey skies.
Lee has run a street food stall in Gangnam for the past 10 years, long before the area was made famous by Psy's hit single, her garish orange tent standing out against the grey concrete skyscrapers.
The tent, however, was pitched on the Grey Towers nature trail, a woodsy path in a hemlock forest frequented by visitors.
Forensic teams searched through the debris for clues and the unrecognisable wreckage of the silver grey saloon car was covered with a yellow tent in order to preserve evidence.
When a woman wears a traditional man's jersey, "you just look like you're wearing a big tent," said Alice Ericsson, executive vice president and group creative director for Grey New York, which is working with the N.F.L. on the campaign (Grey New York is a unit of the Grey Group, part of WPP).
But in 2012, the World Bank measured the poisonous grey puddle above ger (yurt) neighbourhoods where 175,000 families have set up traditional tents and burn coal for warmth.
Two sleek grey dogs named Curry and Chai submitted to a reiki session with artist Kathryn Cornelius under a tent filled with driftwood, sheepskin rugs, and crystals.
Until then, equipment makers can only pray that their latest ultra-light tent or load-lightening pack will put some spring into the steps of grey-haired hikers and dollars into tills.
