A work apron should hang from your shoulders, not your neck

Quick answer: Buy a 10 to 16 ounce canvas apron with cross-back straps, a hem that stops around the knee, and pockets sewn in with rivets or double stitching. Skip anything that hangs from a single loop around your neck.

The neck strap is the problem

Put a few pounds of tools in the front pockets of a neck-loop apron. A tape measure, a pencil, pliers, a coffee can's worth of screws. By lunch you've got a dull ache at the base of your skull, and you've started hunching to take the pull off.

That's the design, not you. All the weight hangs from one narrow band on the most complicated part of your spine.

A cross-back apron fixes it. Two straps run over your shoulders, cross between the shoulder blades and tie or buckle at the waist. The load spreads across your back and hips, and your neck gets left alone. You can feel the difference in about ten minutes.

If you already own a neck-loop apron, you don't need to throw it out. A leatherworker or a decent tailor can convert it, or you can do it yourself with webbing and a pair of D-rings. It's an afternoon job.

Canvas weight is a trade-off

Canvas is sold by weight, in ounces per square yard. The number tells you most of what you need to know.

• 10 to 12 ounces: Soft and flexible. It breaks in fast and moves with you. It's the right call for gardening, cooking, woodworking and general shop days.
• 14 to 18 ounces: Stiff as a barn door when it's new. It takes a real beating from rough lumber, masonry dust and sharp edges, but it'll fight you for a few weeks.

Most guys assume heavier is better. It isn't. A 16-ounce apron on a hot July day in a shop with no cross-breeze will make you resent it. Pick the weight for the work you do most, not the work you imagine doing someday.

Canvas also shrinks. A first wash can take it up noticeably, so buy pre-washed, or wash it before you hem it or cut it to length.

Length decides whether it's in your way

The hem should land somewhere between mid-thigh and the top of your knee. Longer, and you'll step on it going up a ladder or kneel on it and feel it pull at your chest. Shorter, and your jeans are doing the work the apron was supposed to.

If you spend your day at a bench, go shorter. If you're standing over a butcher block or a potting table, you want more coverage, because that's where the splatter and the dirt end up.

The bib matters too. It should come up to your breastbone and stay there. If it flaps forward when you bend over, the cut is wrong or the straps are too long. Adjustable straps with a metal slide buckle fix most of that. Knots are fine if you tie them right, and they'll come loose at the worst moment if you don't.

Pockets are where cheap aprons fall apart

Look at the pockets before you look at anything else. A good apron has pockets sewn on with rivets or double stitching at the stress points, which are the top corners where your hand goes in a thousand times a day. A bad one has a single line of thread that lets go in a month, usually with a full pocket.

Three pockets is plenty. One wide pocket across the lower front for the big stuff. One or two narrow ones above it for a pencil, a marker, a small tape. Anything fancier gets in the way.

Check where the pockets sit, too. If they're too high, your forearm bangs them every time you reach. If they're too low, you're fishing around your knees.

Where canvas is the wrong answer

Be honest about the job.

Sparks. Plain canvas is not flame-proof. If you're welding, grinding or cutting metal, you want leather or a flame-resistant garment made for it. A canvas apron full of grinder sparks is a smoldering apron.

Spinning machinery. This one gets people hurt. Long ties, loose straps and dangling hems have no business anywhere near a lathe, a drill press, a router table or a table saw. Tuck the ties. Cinch the straps short. If the apron can catch on a spinning chuck, it will. Some guys swap to a snug shop smock for machine work. It's the right call.

Wet work. Raw canvas soaks through. For hosing down animals or cleaning fish, you want a waxed or coated apron, or something rubberized over the top.

Break it in, then keep it up

New canvas is stiff and a little hostile. Wear it. Fold it. Crumple it. Wash it once and let it air-dry on a line. Do not throw it in a hot dryer unless you want it to shrink another inch and go brittle at the seams.

After that, treat it like the tool it is.

• Shake out dust and shavings every evening before you hang it up. Sawdust holds moisture and turns musty in a pocket.
• Wash cold when it needs it, and not before. A canvas apron looks better the more it's lived in.
• Re-wax it once a season if you've got a waxed finish. It takes ten minutes and a block of wax.
• Fix a loose seam right away. A pocket that's half detached will tear the rest of the way off at the worst possible time.

It's the same logic as leather that fails from neglect long before it wears out. A good apron outlasts three shirts and two pairs of jeans if you give it ten minutes of attention a year.

What it's worth

A decent canvas apron is a small purchase next to what it saves. A pair of work jeans takes real money, and a good work jacket takes more. Both last longer when something else takes the paint, the grease and the sharpening dust. It's the same reasoning behind buying jeans you can actually work in: spend where the abuse lands.

And one old habit worth keeping. If you borrow somebody's apron for a job, shake it out, spot-clean it and hang it back where it came from. Better yet, bring it back cleaner than it left. A man who does that gets asked back.

Buy the cross-back, check the stitching, and hang it on a hook by the door. The next time you walk into the shop, you'll reach for it without thinking, and that's how you know you got the right one.