I travel. I wear socks. I decided my straight needed a sock too.
Easy to make if you can sew an 'L' shape on a machine or get someone to do it for you. I used canvas.
Here are the steps if anyones interested.
1) cut out a 8 inch by 3 inch piece of canvas (or something similar - normal materiel will be too floppy)
2) On a short edge mark a line 3/4 inch in (on the side of the materiel that will become the inside), and fold along that line. The end of scissors can crease canvas easily.
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3) Fold the piece in half with the fold back to the outside.
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4) Sew down the edge, not too close to it, and turn the corner to do the bottom. I hand stitched the ends of the seam a couple of times to reinforce it a little. The top will come apart easily if the seam has a dodgy finish there.
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5) Using a pencil or similar start at the bottom and poke it inside out.
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6) show your razor his new sock. You should knock it over in half an hour :-)
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