The 2-piece boat seat set is a thoughtful addition to your fishing!For comfort, each fish seat is filled with high-density sponge & covered with superior PVC leather, so you won't feel too tired during a long-time boating. Besides, PVC has great water resistance, wear resistance & fade resistance, ensuring better durability. The low back and widened seat will create a very cozy space for you, while each fish seat could be folded to free up more activity space. Especially its aluminum hinges are helpful to enhance sturdiness, approved by overall load capacity of 400lbs, and smooth folding operation. Based on reality, you can just put each fish seat on a platform or fix it on a supporter with 8 included bolts. Distance between bolt holes is 5", which is applicable to most bases. Please note that no swivel or pedestal included.