Adjustable one-piece traction device for shoes or boots delivers tenacious grip and stability. * 10 rugged, heat-treated carbon steel studs for tenacious grip & stability * Adjustable cord cinches tight for secure fit; Aggressive tread connects mid-foot and heel stud zones * Stretchable rubber for fit and easy on/off; Flexible to -40掳F (-40掳c) * M (5-8), L (8-11), XL (11-13), see size chart for all countries