Nike React SFB Carbon Low shoes in a black colorway. The letters "SFS" on the side of the shoe stand for Special Field Systems, which is Nike's tactical line of gear designed for durability and functionality, often intended for military and law enforcement use. Product Details Brand: Nike Model: React SFB Carbon Low Color: Black / Anthracite Features: Cushioning: Features responsive Nike React foam for comfort during extended use. Durability & Traction: The design incorporates rugged materials, a solid rubber toe reinforcement, and an aggressive tread pattern on the outsole to provide superior traction on varied, rugged terrains. Support: Includes a full-length carbon plate that helps optimize your stride and provides stability. Laces: Equipped with heavy-duty Kevlar laces that can be stowed away. These shoes are built with the durability and support of a tactical boot combined with the performance of an athletic shoe.