Beads swivel independently, preventing buildup of snow and ice Natural rubber sling remains elastic and secure in sub-zero temperatures Durable on tough transitional surfaces such as concrete and gravel Easy on/ Easy off Comfortable for prolonged use WEIGHT: 8.3 - 11.9 oz. per pair Outer Band: Natural Rubber Chains: Steel with Zinc Coating Eyelets: Steel with Zinc Coating Cable: Aircraft-grade Steel Cable Beads: Case-hardened Steel