Greg has provided good information. However, if this Old Town canoe was built in the 1940s, it most likely left the factory with pre-woven cane seats. This material is also available from Perkins, but they call it cane webbing. If your seat frames have lots of little holes, the cane was hand woven. If you see a groove all the way around the frames, about 1/4 inch wide, 1/4 inch deep, then it was machine-woven cane, pressed in, with a spline on top. Tom McCloud