Never checked into shop aprons that closely. Leather, I would use for welding. Waxed, not ran across any, so can't figure what advantage waxed would have. Don't see why a plain denim shop apron wouldn't do, after all, all you want one for would be to keep sawdust off your clothes.
Canvas for me. Weighs less, less sweaty. If I were a turner, it'd be leather for better protection. I prefer a very wide top piece to cover more of my clothing, and I'd like it to come up at least to my collar bone.
I recently experimented with making some waxed canvas shop aprons. What I discovered is that a waxed canvas apron would be great to wear when working with metal, or working with liquids, or maybe using just hand tools, but not so good with power tools. At least the waxed canvas I bought. The wood chips stick to the waxed canvas and it takes just a few minutes in the workshop for the apron to get covered with sawdust. It was disappointing.
I think personal taste will come into play. I have both and the leather is certainly stiffer/heavier but it also repels everything well. It will far outlast the cloth ones. I seldom wear the cloth ones. I have several and just didn't like them as much.
I have both cotton and leather. My leather one is from Highland Hardware (split cowhide) the pockets have covers over them - so they never fill with debris.
Whenever I'm teaching my shop guys how to do things - I wear my leather one - it holds several small tools nicely and securely.
I also have a heavy cotton apron but forget to wear it most times.Haven't been doing much lately since "clean up day" anyway but a few tools need attention/servicing so I'll be making sawdust soon as they are fixed . James.
Sounds like you are picking the waxed canvas. I use several denim aprons in the shop. They are primarily to keep glue and stain off my clothes. I have a turning smock that is a heavy material but it is hot in the summer but it keeps the shavings off me. I do not have a leather apron but if you are a carver the leather protects you better if you slip. Also leather works well for welders but I do not weld so I have no use for leather aprons. I also have a few cloth tie on aprons that are basically pockets that I use when nailing or screwing and need a good supply of screws/nails handy. So the real answer for which type is all the above.
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