New Blundstone #181 Work & Safety in Waxy Rustic Black meets most company uniform colour standards, even if the standard is blue jeans. The waxy finish protects the leather, packing more days into each boot. The patented Blundstone SPS (Shock Protection System) disperses shock at heel strike and reduces skeletal stress absorbing up to 90% of the impact as you walk. Oh, we could wax on!