The Sunny Days Tri-Toon boat is made with HDPE pontoons allowing it to be very light for it's size. HDPE is one of the strongest polymers in the industry, read the www.directboats.com buyers guide for more info. There are also 16 different chambers in each pontoon that will keep you afloat in case of a puncture. The handrails are HDPE high density polyethylene. The Deck is vinyl covered 3/4" marine grade plywood and the aluminum framing keeps the pontoons and deck together. There is a 2 year warranty against manufacturer defects and a lifetimes worth of memories waiting for you in this very nice and unique pontoon boat. If using trolling motor as primary power a 36" shaft is recommended in order to easily handle.