Proprietary tread design for added slip resistance 12 (6/pair) replaceable, military-grade tungsten carbide Due North® Ice DiamondTM spikes maximize traction and performance Spike patterns have been strategically placed at the heel and front of the sole, leaving the mid-sole area open for safe ladder use – no need to remove when climbing or descending ladders (mid-soles models excluded) Exclusive specially formulated 100% natural rubber provides maximum flexibility and durability in extreme cold conditions Improved toe-box design enhances fit and function 360° spike pattern provides more push and lateral grip Unique support hole on heel strap provides easy adjustment, allowing easy put-on and take-off characteristics A low-cost solution for light duty, intermittent use work environments Ideal for the worker who occasionally needs additional traction on ice and snow while performing outdoor duties.