an electrically conductive composition comprises a polymeric foam and carbon nanotubes . the composition has a volume resistivity of about 10 − 3 ohm - cm to about 10 8 ohm - cm . in another embodiment , an electrically conductive elastomeric composition comprises an elastomer and carbon nanotubes , and has a volume resistivity of about 10 − 3 ohm - cm to about 10 3 ohm - cm . the polymeric foams and elastomers retain their desirable physical properties , such as compressibility , flexibility and compression set resistance . they are of particular use as that articles provide electromagnetic shielding and / or electrostatic dissipation , especially for applications involving complicated geometries , such as in computers , personal digital assistants , cell phones , medical diagnostics , and other wireless digital devices , electronic goods such as cassette and digital versatile disk players , as well as in automobiles , ships and aircraft , and the like , where high strength to weight ratios are desirable .