LIGHTWEIGHT, GRIP & SUPPORTIVE CROSS SPIKE. Built with a sock-like fit and all the stability you need to navigate even the toughest conditions. Comes with interchangeable spike receptacles [7 mm pins] so you can properly adjust to race day conditions. Abrasion-resistant outsole has lugs made for both uphill and downhill running, combined with 6 pin interchangeable spike receptacles for ultimate traction. Combination of breathable mesh and suede internal underlays for upper support and comfort. Versatile rubber outsole with recessed receptacles allows for great traction even without spikes and can be used on just about any surface.