There is no finer material for protecting your precious straight razor than leather. Leather is renowned for its protective qualities, just ask a motorcyclist.
Leather is particularly suitable for a razor because, as it's breathable, it absorbs moisture. This means that the razor is stored in an environment where mousture is drawn away from the razor; moisture means corrosion.
These marvellous cases are made in the UK by leather working craftsman, Tommy Morton of Pilgrim Leathercraft. Check out his work.
These are the finest cases I have used and I'm proud to endorse them.
This is beautiful leather, but it's supple yet tough. The case will keep your razor safe and supported; even when held upside down, the tension of the case holds your razor safely.