Timberland is offering to plant a tree every time an online customer chooses to have their orders delivered in four to eight days versus the standard three days, according to a report from Reuters.

The footwear brand, owned by VF Corp., has been offering the program since August. Acceptance has averaged about 14 percent and resulted in about 55,000 tree plantings so far. The offer supports Timberland’s commitment to plant 50 million trees by 2025.

“Hopefully it’s a step toward making a larger impact,” Tracy Smith, Timberland’s VP for North America, told Reuters.