Composite Safety Toe Meets Astm F2413 M I/75 C/75 Eh and Will Not Set-Off Metal Detectors. Durable, Seamless Upper Is 100% Liquid Proof. Slip-Resistant, Nitrile Rubber Outsole Provides Superior Grip On Dry, Wet, and Contaminated Surfaces. Tiny Air Bubbles Trapped Within The Material Keep Feet Warm In The Cold, and Cooler In The Heat. Beveled Heel For Reduced Back and Leg Strain. Treat Wear Indicators To Show When Half The Tread Has Worn Away.