Simms Flyweight Boot Vibram Steel GreyA fully considered update to one of the most capable, comfortable wading boots in the Simms line, the new Flyweight Boot is a balanced blend of lightweight, travel ready performance, grippy Vibram traction, and the kind of no quit durability that gets it done. Durable and lightweight, TPU based synthetic woven upper material Molded, rubber toe wrap and abrasion panels protect against wear and tear Lace up closure with reinforced eyelets High cushion