Logitech · Official replacement (OEM)
Zone 300 Series Replaceable Earpads
Verified as compatible with 1 headphone model.
Verified compatible headphones
Evidence
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logitech.com
Logitech's guide is titled for Zone 300/301/305 replaceable earpads. It describes pulling the old pad off and stretching the new pad's inner flap around the earcup, then rotating and adjusting it to fit securely. The guide also lists the three compatible models and the 66 × 66 × 16 mm dimensions.