Bumfortable seat for the Zegul Frej 504

Which Bumfortable seat fits the Zegul Frej 504?

The “Bumfortable Kayak Seat - Flat” fits the Zegul Frej 504.

Bumfortable Kayak Seat - FlatNZ$320.00

View the Frej 504 on the Zegul website (opens in a new tab)