Sierra is the first Merlin boot to feature the Vibram high-grip, no slip sole. In a mid-height fit, Leather construction. Sierra is lightweight, easy to wear, has great comfort levels and importantly high levels of durability. Further, Sierra features an innovative ratchet closure system for a micro-adjustable precision fit and D3O®?s shock absorbing impact protection.MaterialPremium Brushed Leather UpperReinforced Scratch Rubber PanelsBallistic, Padded Nylon Collar and Tongue PanelsVibram® High Grip SoleComfort Mesh Inner LiningHigh Density Nylon PanelsPull TabsWaterproofingHipora® Waterproof and Breathable MembraneFeaturesMicro-adjustable Precision Fit Ratchet FittingAnti-bacterial Sole Insert7 / 41 8 / 42 9 / 43 10 / 44 11 / 45 12 / 46 13 / 4765-485-0265-485-0365-485-0465-485-0565-485-0665-485-0765-485-08