Three-layer Sensorflex™ technology in these men's hiking boots flexes and supports with every step, keeping you on your toes. The Defender Repellent Systems® treatment to the leather helps protect from spills and prevent stains. Made with premium full-grain leather from a Leather Working Group Silver-rated tannery. SensorFlex™ technology delivers support, suspension and flexibility. Defender Repellent Systems™ protects against spills and stains. Rustproof, speed lace hardware with lace hooks at top. Cushioned EVA footbed for support and shock absorption. One or more major components use at least 50% leather tanned in a facility rated Silver or higher by a third–party environmental audit. The Leather Working Group judges and classifies tanneries based on energy use, waste production and water treatment.