The Three Layer Polyethylene has been used to successfully manufacture several canoe models for decades. This material is used to produce canoes using a rotational molding process which was first developed by Old Town in 1983. This scientifically-designed structural sandwich includes a layer of closed cell foam surrounded by layers of high-density linear polyethylene. This combination, and the unique process by which it is accomplished, are the principle reasons for the material's strength. The material also ensures buoyancy. Under most conditions when the canoe is filled with water, the canoe will remain afloat.