The Eco Green Vine Mustache is a common pet accessory in Adopt Me! that can be found and purchased in the Hat Shop for 110. It was released on October 5, 2021 during the Eco Accessories Update.
The Eco Green Vine Mustache features two green vines arranged in the shape of a handlebar mustache. The leaves on the vines go from dark green to light green. This pet accessory goes on a pet's face.
The Eco Green Vine Mustache as seen on a Dog