Made from EPDM rubber, impervious to UV rays and salt water. Easy to fit, requires no extra fittings. *Boat length given as an indication only, in the case of a sheltered mooring location. In a more exposed mooring area, you should select the next size up, for both line and mooring compensator. Boat length given as an indication only, in the case of a sheltered mooring location. In a more exposed mooring area, you should select the next size up, for both line and mooring compensator. Instantly adaptable to any type of mooring:On a sheltered mooring, for example in a marina, coil the rope once or twice round your compensator.