Replacement foam Pads for Koss Porta-Pro Headphones. Coming in at roughly 50 grams, it’s hard to find a lighter solution to those who want maximum portability with exceptional sound than the Koss Porta Pros. That said, the stock foam can wear out quickly and easily collects dust, which may leave you longing for a way to replace them. Dekoni is happy to offer replacement pads for the Porta Pros, which also support the KPH30i