Abstract: A product for monitoring the condition of a wound comprises: (a) a sample application zone; (b) a reaction zone downstream of the sample application zone comprising protease-sensitive polymers; (c) coloured particles; and (d) a viewing zone downstream of the sample application zone and reaction zone. The sample application zone transmits fluid towards the viewing zone. Cleavage of the polymers by protease activity present in applied wound fluid results in carriage of the coloured particles with the wound fluid to the viewing zone thereby providing a visual indication of protease activity in the viewing zone. A product for monitoring the condition of a wound comprises a matrix that absorbs wound fluid. The matrix comprises cross-linked and protease-sensitive polymers forming a reaction zone on/in the matrix, and, coloured particles.