Given the right conditions, all mooring buoys will rub against the side of the boat’s hull. The contact points of Mara Buoy is made from polyethylene and has smooth edges. The upper rope guide at the top of the buoys is made from a particularly soft polyethylene to minimise any chance of damage.
The life of a Mara Buoy will depend on how harsh the operating conditions are, wave action, water salinity, UV intensity, etc. However for most applications we would expect the life of the main structure to be well over 10 years. They are designed purposely for a long life, making them very cost effective.