Elastic faux-leather mounting ring; align the molded lip with the housing groove, then rotate clockwise until seated.
Sound / ANC
Exact-model OEM velour pad set. The manufacturer notes that pad condition and seal can affect sound; no separate acoustic tuning specification is stated for this replacement set.
The DT 270 PRO-specific instructions describe the elastic faux-leather mounting ring, molded lip, housing groove, and clockwise rotation to seat the replacement pad.