I"m planning to use a 14oz canvas from the local Fabricland, called "shoe canvas". It is much heavier than the fabric in a new pair of Levi's. Or Wranglers, for that matter. Most of the cotton duck I have seen in fabric store is much lighter than blue jean material, and is too light.

Roger

:Today I found canvas at a local fabric store. But no one who works there can
: tell me what the ounce per yard is or if it is even a #4 or #10 duck
: canvas. It is all on sale and they seem to have a variety of varying
: thicknesses. the brand manme is "Oak Hill" and "River
: Hill" So is there anyway to visually tell if it is thick enough? And
: will the colored ones affect the waterproofing of a kayak? Any input is
: appreciated.

: Rick