Hi milos, plywood used for kayak on pictures and videos is a regular one. this same non waterproof plywood is used in doubletrouble too. and for more then a 3 years. Model: length: hull weight: beam: max payload: cockpit size: paddler weight: knee height: max. men’s shoe size: wood duck 10: 10′ 0" 36 lbs. 30 in. 250 lbs.. Green valley boat works canoe and kayak plans: models available. kite: our premier 14’10" solo tripping canoe, a new better-looking version of the osprey (see below)..