Floor protection and interior comfort occupy the same cabin but solve different problems. A floor liner or mat intercepts shoe wear, grit, water, salt, and spills before they reach carpet. Its performance appears in captured contamination, dry underlying material, stable retention, intact edges, and clear pedal travel.
Interior comfort manages how an occupant experiences posture, pressure, temperature, airflow, sound, touch, and reach. Seat cushions, shades, covers, supports, or thermal accessories can change that experience, yet they do not create a sealed debris reservoir. The categories meet at shared space: a thick or displaced floor covering can change foot position, while a comfort accessory can alter control access or restraint geometry. Each needs separate acceptance evidence.