Carrying a wood saw without having its blade somehow covered is an accident waiting to happen.

You can construct a simple sleeve for it out of old newspapers.

Step 1: Materials

For the sleeve you only need a couple pages of old newspapers and duct tape.

Step 2: Construction

The construction is really simple.

Take some pages from the newspapers (5 - 6 are enough) and fold them around the blade like an envelope.

Then fold the end of the envelope towards the handle of the blade.

Seal the openings with duct tape.

That's all!