The KEEN KNX Chukka fuses its leather upper straight to the sole through KEEN. FUSION construction, replacing the glue seam a typical leather boot relies on. That bond outlasts a traditional adhesive seam over years of wear, and it starts with LWG-certified leather tanned using cleaner water practices. This chukka earns its everyday spot without cutting corners on how it's built. What Our Gearhead(R) Experts Are Saying:"I've worn glued boots that start peeling at the toe within a season, and the sole on my KEEN KNX Chukka hasn't budged after months of daily wear. The leather has softened right where my foot needs give, without losing shape anywhere else."