TOPSLEEVE 15/22mm sheep wool pipe insulation is an environmentally friendly, fire retardant, effective form of pipe insulation to help improve heating system efficiency by reducing heat loss from bare pipes. 7.2m - covers approx 3m of pipe TOPSLEEVE range of pipe insulation covers different pipe sizes with a simple application. For both new and existing installations, as well as being able to fit around complex joints, corners, and compact pipework, TOPSLEEVE effortlessly insulates pipes by creating a thermal barrier. In addition to the insulation benefits from using TOPSLEEVE, our range also offers acoustic insulation, stopping noisy pipes between cavities which expand & contract with temperature. Wool is a natural flame retardant does not ignite or support combustion. Wool insulates naturally against heat and cold, because it absorbs moisture vapour, wool in cold weather even a little moisture on pipes becomes cold quickly reducing temperature, by absorbing the moisture a dry layer of air left on the pipe helps to hold in the heat, in addition the crimp in wool fibres makes them stand apart from each other, this lining of air trapped inside the fabric acts as a insulator, still air is one of the best insulators found in nature. Wool naturally absorbs moisture from the air, the tendency to collect static electricity is reduced. Wool is a superior acoustic insulator against noise; it absorbs sound and reduces noise level considerably. Wool resists dirt and retains its appearance and stays cleaner longer. Its ability to absorb moisture prevents a build up of static electricity and therefore wool does not attract lint and dust from the air. Dust free when handling. Rigid structure prevents splitting when threading and/ or wrapping around copper pipes. PLEASE NOTE: the seam is not detachable so this will need to be fed over pipework from an open end.