The Due North Qwik-Grip Mid-Sole is the easy-to-use one-size-fits-all solution that provides maximum safety and productivity on ice and snow. Military grade tungsten carbide ice penetrating spikes deliver superior traction. Universal fit does not require specific size requirements. Easily rotates to top of foot to allow driving, climbing or indoor use. Reflective hi-vis material provides added visibility and safety. Specially formulated rubber pad provides unsurpassed comfort and durability even in extreme cold working conditions. Styles available for defined heel, non-defined heel, and mid-profile footwear.