100% waterproof triple-dipped latex neoprene; ozone, acid, chemical resistant; lighter & more pliable than ordinary rubber; hand-layered construction provides flex & strength at critical stress points. Slip-resistant, non-marking Chevron outsole provides excellent traction in extreme conditions on any surface. Polymeric foam insulation delivers boot temperature rating of -10 ?F (-23 ?C). Moisture-wicking Breathe-O-Prene insoles absorb shocks and have a breathable, open cell structure to reduce insole drying time. Steel toe meets ASTM F2413-11 M I/75 C/75 & Canadian Standard CSA Z195-09; toe & heel guards protect against abrasions; heel counter secures the foot to prevent movement in the boot.