Article and sensor system

An article wearable on a skin of a user, the article comprising:

• a base film, comprising:
• a first base major surface;
• a second base major surface opposite to the first base major surface and facing the skin of the user;
• a through-opening extending between the first base major surface and the second base major surface;
• and
• a base adhesive layer forming the second base major surface and comprising a base adhesive configured to removably attach the base film to the skin of the user,
• wherein the through-opening is configured to align with and at least partially and removably receive a sensor therethrough upon placement of the article on the sensor that is attached to the skin of the user, wherein the article is separate from the sensor;
• and
• a cover film at least partially disposed on the base film, the cover film comprising:
• a first cover major surface;
• and
• a second cover major surface opposite to the first cover major surface and at least partially attached to the first base major surface of the base film;
• wherein the base film and the cover film are configured to removably and at least partially enclose the sensor, such that the article is removable from the skin of the user while the sensor remains attached to the skin of the user.