Aggressive Spike Ice Traction Device 6320 Aggressive Spike Ice Traction Device: delivers aggressive traction on ice and snow for more extreme working conditions.Durable stainless steel aggressive chain and spike system offers tenacious grip and stability on ice and snowInnovative heel spike plate design provides enhanced traction on uneven surfacesHi-Vis Orange stretchable rubber ring ensures a secure fit and maintains flexibility to -40°F (-40°C)S (5-7), M (7-9), L (9-11), XL (11-14), see size chart for all countriesErgodyne