NARS Safety Footwear Guidelines

Safety boots must meet the following criteria

Leather or leather-like upper.
Sturdy, non-leather sole that will resist puncture: Footwear must afford support and protection on uneven terrain and must have soles that provide good traction and thick enough to withstand punctures.
3/8- to 1-inch defined instep: A “defined heel” means that the back of the heel is at an approximate right angle from the sole of the shoe and from the ground when standing. The front of the heel must not be at an angle of less than 45 degrees from the sole of the shoe to the ground. Footwear with heels commonly called “riding heels” are not appropriate footwear and do not satisfy this requirement.
Above ankle (5-inch height as measured from inside boot): Footwear that covers the ankle will be a boot of approximately 6 inches or more in height.
Steel toe or carbon toe: Minimum ASTM F2412-05, ASTM 2413-05 – 75-pound impact and compression class toe.
Lace-up: Lace-up boots are required for Transportation Department (conductor, freight car, signal) employees, and laces.