Levi's collected 18,850 pairs of jeans to donate to Goodwill and transformed the San Francisco 49ers field into a literal "Field of Jeans" for a day. 

The San Francisco 49ers and Levi's, based and formed in the same city, have been a natural pairing since they announced Levi's Stadium last year. The partnership has already bore fruit in the form of a special Levi's collection and an extensive in-stadium art collection, but this latest project between the two is probably its greatest one yet. 

Levi's covered the field in jeans to illustrate how a small act, such as donating a pair of jeans, can make a great impact. Watch the entire video above. 

[via Levi's on Vimeo]