New Snug Fit design and ergonomic orthotic insole, plus the optional felt insole to adjust fit. Made of highly abrasion and chemical resistant synthetic rubbers. High impact, abrasion, chemical, oil resistant nitrile lug sole. Air-cushioned heel with achilles tendon, ankle and metatarsal protection. CSA Z195-02 ‘Green Tree’ chainsaw protection, CE Class 3 (highest) chainsaw resistant. CSA Class #1 steel toe and plate. CSA Omega – electric shock resistant.