This winter cover is available in four different colours. Fastening systems: Fastening with individual bungee cords + fixed stainless steel eye bolts. Safety (COMPLIANT TO STANDARD NF P 90 - 308). Fastening with individual bungee cords + safety washers + nickel-plated brass eyebolts. (COMPLIANT ACCORDING TO STANDARD NF P 90 - 308). The winter cover comes with a 3-year guarantee.