NIKE SFB Field 8 Leather Mens leather-and-synthetic A modern, athletic boot designed for first responders, the Nike SFB Field 8" Unisex Boot features a breathable canvas and durable synthetic upper with a dynamic lacing system for ultra-lightweight comfort and lockdown Breathable canvas and durable synthetic in upper for lightweight, ventilated comfort Dynamic lacing system and 8" shaft for enhanced lockdown and supportDynamic lacing system and 8" shaft for enhanced lockdown and support Phylon midsole for stability and lightweight cushioning The outsole is equipped with an aggressive traction pattern and internal rock shield for multi-surface grip and puncture protection