Yaktrax, Extra, Extra Large, Diamond Grip Tier Traction Device, For Anyone Working Outdoors In The Winter, Innovative Diamond Bead Design Provides Aggressive Traction For All Winter Working Conditions, From Boilerplate Ice To Backcountry Snow & Everything In Between, Beads Rotate Independently, Helping To Reduce Snow & Ice Buildup While Their Low Profile & Extreme Durability Make Them Ideal For Long Term Use On Any Winter Jobsite That Contains Inconsistent Surfaces Such As Patches Of Gravel & Bare Concrete Intermittent With Ice & Snow, Easy On & Off, Fits Men 13-15 Oversized Boots.