Adjustable One-Piece Ice Traction Device: delivers tenacious grip and stability for shoes and boots..FEATURES 10 rugged, heat-treated carbon steel studs for tenacious grip & stabilityAdjustable cord cinches tight for a secure fitStretchable rubber for fit and easy on/offAggressive tread connects mid-foot and heel stud zonesReflective pull-on tab adds enhanced visibilityFlexible to -40°F (-40°C)M (5-8), L (8-11), XL (11-13), see size chart for all countries#6301 replacement studs sold separately .APPLICATIONS Road Construction, Construction, Roofers, Trades, Installers, Contractors, Delivery/Service,Landscaping, Utilities, Logging, Cheating at Boot HockeyErgodyne