The older models REAL PURE, BLUE (2020) as well as REAL BLUE NC (2020) have a red fabric cover inside the cushion. The new REAL BLUE/BLUC NC models (on sale since Nov. 2021), on the other hand, are equipped exclusively with a black fabric cover.
Left image: Red fabric cover inside the cushion = REAL BLUE (2020) and REAL BLUE NC (2020).
Right image: Black fabric inside the earphones = REAL BLUE and REAL BLUE NC
