How to make the Isle Royal style Frost River backpack clone. I've done these in inches, and while everyone in the U.K. can work either imperial or metric, our friends in Merikay, being easily confused and confounded tend to go into brain meltdown with centimetres, millimetres and the like. In the meantime, have a go if you have some spare stiffish material and see how it works out. Oh, and you need to add half an inch seam allowance all round. Enjoy
