braided or twisted at least one of the strands is preferably formed of fiberglass each of the other two strands may be fiberglass nylon polyester or other fiber as heretofore described excluding of course aramid and extended chain polyethylene the covering for the core includes at least two strands 26 28 wrapped about the core in opposite directions relative to each other such as a first wrap in a clockwise direction and a second wrap in a counterclockwise direction the covering strands 26 28 may be fiberglass nylon or polyester or the other fibers referred to above thus for the purposes of comparison the yarn of fig1 may be thought of as comprised of four pieces or four plies or four ends while the yarn of fig2 may be thought of as including five pieces or five plies referring next to fig3 yet another form of the yarn of the present invention is illustrated this also being a five piece or five ply yarn 30 the yarn 30 includes a core and a covering the core including two strands 32 34 at least one of which is fiberglass and the covering including three strands 36 37 and 38 two of which are wrapped in the same direction around the core and the third being wrapped around the core in a direction opposite to the other covering strands thus for the purpose of illustration the covering comprising strands 36 37 and 38 includes an innermost covering strand 36 wrapped in a first direction about the core a second covering strand 37 wrapped around both the core and the first covering strand 36 in a direction opposite to the direction of covering strand.