What this does for you Restores and improves the listening experience for Porta Pro / Portapro PP headphones by replacing worn or cracked pads. Improves lowfrequency response and isolation through a better eartodriver seal, so bass is clearer and fuller. Reduces ear fatigue with soft cushioning for longer, more comfortable listening sessions. Key features Included: 2 replacement ear pads (left and right). Materials: soft foam core wrapped in polyurethane (PU) leather — comfortable to wear and durable for regular use. Performance: foam cushioning maintains distance from the driver while the PU leather helps seal sound, supporting improved bass and consistent audio balance. Compatibility Designed for Porta Pro / Portapro PP Headphone. Also compatible with many similarsized Koss models and other headphones that match the pad dimensions: KSC35, KSC75, KSC55, KSC50, KSC10, KTX PRO1, KTX8, PTX6, KSC11, KSC17, KSC7, KSC12, CX6, KTX16, SA, UR5, and more. Dimensions (measured at the pad) Front outer diameter: 1.97 inches (5 cm) Back outer diameter: 1.57 inches (4 cm) Inner (driver opening) diameter: 0.79 inches (2 cm) These measurements provide a snug, secure fit for the listed models and similarly sized headphones. Practical use scenarios Daily commute: flattened or torn pads to restore bass and comfort during travel on buses, trains, or bikes. Home listening and long sessions: Use for extended music, podcast, or audiobook sessions without discomfort from hard or worn pads. Refurbishing vintage or secondhand headphones: Give older Porta Pro and compatible models a like feel and performance by swapping old pads. Installation and care Simple to fit: peel off the old pads and stretch the pads over the ear cup; alignment is straightforward for the listed models. Care: wipe PU leather with a damp cloth; avoid solvents and extended exposure to direct sunlight to prolong life. Why choose these pads Direct replacement sized for Porta Pro and compatible models. Combination of soft foam and PU leather balances comfort, durability, and sound sealing — addressing common problems like torn pads, loss of bass, and discomfort. Specifications summary Quantity: 2 ear pads Material: foam + PU leather Compatibility: Porta Pro / Portapro PP Headphone and listed models (KSC35, KSC75, KSC55, KSC50, KSC10, KTX PRO1, KTX8, PTX6, KSC11, KSC17, KSC7, KSC12, CX6, KTX16, SA, UR5, etc.) Dimensions: front outer 1.97 in (5 cm) / back outer 1.57 in (4 cm) / inner 0.79 in (2 cm)