Composite material

An electrically responsive composite material, comprising:

• a carrier layer having a length and a width and a thickness that is relatively small compared to said length and said width;
• and
• a plurality of electrically conductive or semi-conductive particles, said particles being agglomerated to form a plurality of agglomerates dispersed within the carrier layer such that each said agglomerate comprises a plurality of said particles,
• wherein each said agglomerate has a first dimension in the direction of said thickness that is equal to or longer than said thickness of said carrier layer, such that each said agglomerate by itself is arranged to provide a path of electrical conduction across the thickness of said carrier layer in response to applied pressure such that said electrically responsive composite material has a resistance that reduces in response to applied pressure.