A polyaryletherketone composition has a plurality which is such that a wire coated with the composition has a recoil of not more than 40.degree.. Compositions having such pliability include those containing a polyaryletherketone and boron nitride. The polyaryletherketone can be polyaryletheretherketone. The composition can be obtained by blending together the polymer and boron nitride, and the blend can be extruded onto an electrical conductor. When extruded onto a wire, the composition gives a more pliable coated wire than is obtained using the polymer alone as the wire coating. The composition gives a coherent coating when coated onto a wire. The composition is also suitable for the production of bearings or bearing liners.