A sealed force-sensitive resistor (10) is provided comprising: a bottom layer (8); a first conductive element attached to the bottom layer (8) and a top layer (9). The top layer (9) is sealed to the bottom layer (8) in an airtight manner. The force-sensitive resistor (10) further comprises a spacer ring (18) surrounding the first conductive element and a flexible top sensor layer (19). The top sensor layer (19) is attached across the spacer ring (18) and comprises a second conductive element facing the first conductive element. The flexible top sensor layer (19) is moveable in use in relation to the flexible bottom layer (8) to vary the resistance of the force sensitive resistor (10). The force-sensitive resistor (10) further comprises an air permeable spacer material (5) between the top and bottom layer (9, 8).