A wear member for attachment to a surface of a machine , the wear member comprising: a body having a pair of opposing first sides and a pair of opposing second sides ; an outer layer of the body having an outer surface and an inner surface , the outer layer including a plurality of channels formed in the outer surface, the channels being parallel to each other and extending between the first sides of the body; and a base layer of the body attached to the inner surface of the outer layer and adapted for attachment to the surface of the machine, the base layer being divided into a plurality of base layer pieces , each of the plurality of base layer pieces including at least one interfacing edge , the plurality of base layer pieces being assembled together such that each interfacing edge of each of the plurality of base layer pieces is opposite an interfacing edge of another of the plurality of base layer pieces; characterised in that the plurality of base layer pieces are assembled so as to define at least one gap therebetween; and in that the interfacing edges of each of the plurality of base layer pieces are configured with at least one finger and at least one recess , the finger and the recess on the interfacing edge of each of the plurality of base layer pieces being configured such that when the base layer pieces are assembled together, the finger on the interfacing edge of each base layer piece is received in the recess in the interfacing edge of another of the base layer pieces that is complementarily configured and such that the at least one gap between the plurality of pieces does not extend parallel to a full length of any of the channels in the outer surface between the first sides of the body. a body having a pair of opposing first sides and a pair of opposing second sides ; an outer layer of the body having an outer surface and an inner surface , the outer layer including a plurality of channels formed in the outer surface, the channels being parallel to each other and extending between the first sides of the body; and a base layer of the body attached to the inner surface of the outer layer and adapted for attachment to the surface of the machine, the base layer being divided into a plurality of base layer pieces , each of the plurality of base layer pieces including at least one interfacing edge , the plurality of base layer pieces being assembled together such that each interfacing edge of each of the plurality of base layer pieces is opposite an interfacing edge of another of the plurality of base layer pieces; characterised in that the plurality of base layer pieces are assembled so as to define at least one gap therebetween; and in that the interfacing edges of each of the plurality of base layer pieces are configured with at least one finger and at least one recess , the finger and the recess on the interfacing edge of each of the plurality of base layer pieces being configured such that when the base layer pieces are assembled together, the finger on the interfacing edge of each base layer piece is received in the recess in the interfacing edge of another of the base layer pieces that is complementarily configured and such that the at least one gap between the plurality of pieces does not extend parallel to a full length of any of the channels in the outer surface between the first sides of the body. <EOS>