Nike Men's SFB Sage Green Boot 9 M US Quick-drying synthetic leather overlays for durability and support Multiple ventilation zones that allow theboot to breathe and drain quickly Genuine leather footbed for durability, flexibility and comfort A special lock-lace system helps keep your foot in place to maintain a comfortable, customized fit during extended wear Nike Free inspired outsole, designed for traction on all terrains Weighs 15.9 oz, about two-thirds the weight of traditional boots