Vans and National Geographic come together for a collection of footwear and apparel that celebrates over 130 years of the never-ending quest to explore our planet Honoring National Geographic's longstanding tradition of exploration and storytelling, the Vans x National Geographic Classic SlipOn is meant to bring attention to the dramatic reduction of ice sheets in Greenland and Antarctica.The Then/Now Glacier style features National Geographic photographs of the Pine Island Glacier in Antarctica