From Danner: "Designed for speed and constructed for stability, the G3 is built on our lightest and most versatile TFX platform, the Danner TFX-8. Lined in waterproof, breathable GORE-TEX for comfort and protection from the elements. The Desert TFX G3 also features a durable, rough-out leather upper with lightweight 1000 Denier nylon. The Vibram Striker Torrent outsole is designed with a pentagonal pivot point lug pattern for grip in all directions." These boots were worn once and five to be a poor fit. Lucky you!