Viking Lace Up Spiked GumbootsOur 12" Rubber Calk features a full lace-up front that provides support and stability. The double layer of rubber in the foot and heel area prolongs the wear of the boot. Handmade from all natural rubber, this boot also features a steel shank, rust free eyelets and an arch support for comfort. Replaceable calks were added to provide outstanding traction in wet and snowy conditions.