Enhanced 100% natural rubber compound provides added traction and secure fit while retaining elasticity in subzero temperatures. Geometrically designed top webbing and improved shape provides a more comfortable fit on a greater variety of footwear. Knurled, textured lining and a wide, thick heel strap grips footwear better and helps keep traction aids in place for longer wear and optimal performance. 6 Tungsten Carbide Due North® Ice Diamond™ Spikes, along with the bi-directional tread, provides powerful traction with maximum grip. Spike patterns have been strategically placed at the heel and front of the sole, leaving the mid-sole area open for safe ladder use. Specially designed “Pulse Grip” tread pattern. For even greater security and fit, Due North® offers an optional retention strap (sold separately). Industrial grade sole offers unparalleled grip, maximum durability and superior operator safety.