As is typical for Keen, the toe box of the KNX shoes islets sayshaped like a foot, not like a shoe: in many shoes, the toe area narrows unnaturally. Keens fit is relatively wide, and there is plenty of space for the toes. The sole structure is very flexible. While these are not barefoot shoes, they share some similaritiesyour feet definitely wont get lazy walking with such a pliable sole. - Slightly wide fit, Keen "Original Fit" - Elastic laces, no need for tying - Upper made of high-quality leather - Naturally treated to prevent odors - Lining material and insole surface are leather - Drop: 3 mm The leather used in this product comes from an LWG-certified tannery. LWG monitors aspects such as water usage and chemical load in leather production. These shoes use a rare technique where materials are fused together by heat instead of glue. Since adhesives significantly contribute to the chemical load in footwear manufacturing, avoiding glue is an eco-friendly choice.