He was killed when a three-year-old boy wandered into his enclosure

Harambe was 17-year-old gorilla who was shot dead this past May

Over a thousand sweatshirts at $49.99 each have sold in less than a week

His death made him an icon. This holiday season, he is being immortalized.

Harambe, the gorilla who was shot dead by zookeepers in Cincinnati after a three-year-old boy errantly wandered into his enclosure this past May, is now featured on a Christmas sweater that is selling fast.

A likeness of the 17-year-old Western lowland gorilla is on a design issued by Fresh Brewed Tees, according to TMZ.

The sweater, which is available for $49.99, is a hit with shoppers who have bought over 1,000 in less than a week.

A company called Fresh Brewed Tees has issued a special Harambe holiday sweater that has proven to be a hit with shoppers who have snatched up over 1,000 in less than a week

The brainchild behind the sweater was wise to capitalize on the Harambe craze six months after it swept the country.

On May 28, 2016, three-year-old Isiah Gregg fell 15 feet into the moat of the gorilla enclosure at the Cincinnati Zoo.

In the ensuing moments which were captured on video, Harambe, the 450lb gorilla, dragged Isiah through the water before standing over him as the horrified crowd of zoo visitors looked on.

Zoo personnel, fearing for Gregg's life, shot Harambe dead.

Harambe was a Western lowland gorilla who was shot dead by zookeepers at the Cincinnati Zoo who feared for the life of a three-year-old boy who fell into his gorilla enclosure

Video of Harambe's encounter with the boy (above) in the moments just before he was shot dead went viral. It shows the gorilla dragging the boy through his enclosure

Animal lovers were outraged over the decision to shoot the gorilla, saying that the video showed he was protecting the boy, three-year-old Isiah Gregg (seen with Harambe above)

The story and the footage went viral worldwide and became a hotly debated topic.

Animal rights activists and conservationists were outraged over the zoo's actions, saying that Harambe was protecting the boy and did not pose a threat to his life.