Workers across Canada swear by the kick-off ease of the 163 safety boots by BLUNDSTONE. All-day comfort even on concrete floors and extra over-the-ankle protection. CSA approved. Spiffy enough for after work too!  Details CSA Grade 1 toe and underfoot puncture protection Weatherproof leather is an industry-leading 2.5 mm thick, yet 'breathes' for absolute comfort Dual-density polyurethane midsole and thermo-polyurethan (TPU) outsole: flexible, lightweight and durable PORON XRD™ removable comfort classic footbed for all-day comfort and support  Puncture resistant metal free mid-soles: lighter, safer and more flexible Injection molded soles -- no adhesives to come unglued, no stitching to rot Heat, slip, oil, acid and electric shock-resistant sole Heat-formed heel for a snug fit CSA  Approved Unisex sizing Rule of Toe For women, subtract 3 sizes from your Canadian sizeFor men, subtract 1 size from your Canadian sizeFor kids, subtract 1 size from your Canadian size Blundstone Blundstone 163 - Work & Safety Boot Black