The cube race cold conditions leg warmer is made of a stretch material which is insulated for those colder temperatures to keep your warm protected from the wind and cold and to stop your joints from seizing up the cube leg warmers have a preshaped anatomical cut for a fantastic fit and are rubberized at the lower edge to keep them in place and stop them from rising up your legs cube race cold conditions leg warmer features flatlock seams anatomical cut rubberized at the lower edge