The fourth generation of KEEN’s most iconic hiking boot debuts today with a big proclamation: “The last hiker you ever need to buy.” That’s because the Targhee IV is more durable than ever, meaning it’ll last for hundreds upon hundreds of miles. 

It’s a level of sustainability that KEEN is putting a guarantee behind.

In the shoe brand’s test lab, the Targhee IV endured 1,000 miles without breaking down. KEEN says that’s because of the newly introduced KEEN.FUSION, which creates a mechanical bond stronger than glue to increase durability. It eliminates the issue of delamination — which is when the glue used to adhere to the rubber sole degrades. The brand calls it a Delamination-Free Lifetime Guarantee.

This guarantee ensures that any shoe under this warranty is eligible for a replacement or store-issued credit in the amount of the original purchase price should the outsole separate from the midsole or the midsole separate from the upper shoe. The Targhee IV will be the first shoe backed by this claim.

Maintaining KEEN’s fit and comfort, including ample forefoot space, the Targhee IV also has a Luftcell midsole, and an abrasion-resistant outsole that’s twice as durable as rubber.

“I’m thrilled to see our revolutionary Targhee IV come to life. The Targhee IV leverages the latest in KEEN.FUSION and LUFTCELL technology, creating footwear that is no longer limited by weak bonds and short-term fixes. This radical boot is a testament to KEEN’s long-standing commitment to reducing the impact that our shoes have on people and the planet,” said Scott Labbe, senior vice president of KEEN Global Product and Innovation.

Traditionally and to this day, most shoes are made using cement construction. KEEN.FUSION, however, is a direct-injection process that eliminates the need for glues and solvents, which are among the six classes of the most toxic chemicals in consumer products. As a result, customers can keep wearing their boots, rather than replace them down the line.