Loafers have long borrowed from moccasin construction: a low profile, stitched vamp and easy slip-on shape. A small metal bit across the front adds polish without changing that relaxed feel. It is a detail that reads clearly from across a room, but still works with everyday clothes.

Backless mules pare the shape back further. A slim vamp and open heel make them feel lighter than a classic loafer, while platform soles add a little height. Across this edit, the defining elements are simple: a low-cut upper, a metal accent and an easy way in.

I like starting with the backless pairs for their clean line. Some are mules, some are slides, and some have a more structured loafer front. In my fashion dreams, she is walking to a Sunday market in October in a camel coat, bare ankles above the cold pavement, a mule tapping along. The Alora in coffee suede-look would be my pick for that, with the Ali Perfed Bit Mule in black for a work week. The Grand Mule in tan burnished napa has moc stitching I would check in person. The Radford Bit Mule in woven brown leather and the Linnie Mule in croc-embossed brown round out the browns. Test: press the bit with a thumbnail. Hardware that sits flat and is stitched in beats one that wobbles.

The best bit loafers balance a slim shape with a single piece of hardware that sits neatly across the vamp. That gives the shoe a tailored feel without making it too formal.

The Loraine from Sam Edelman in black leather has the slimmest gold-tone snaffle bit here, on a flat sole, so it is the one I would wear with tailored trousers and a white sock. The Maris from Franco Sarto is dark brown with a gold-tone chain snaffle, a good one for a plaid skirt and knee-high tights now that the weather has turned. Rothy's makes the Double Bit Loafers in a sand tone, made from washable knit, which suits a rainy commute, and the Arezzo Emma in tan pebbled leather has a polished silver-tone bit that is a quieter route.

In the fitting room, slide a finger under the bit. It should sit snug against the leather, not rattle. Look at the vamp too: a gathered or softly pleated top line gives the shoe a little texture. Leather loafers stretch with wear, so start with a snug fit, or try a half size when possible.

What I would skip: the LifeStride Dolce-Bit if you want a flat, slim look, since it sits on a wedge. It is a fine shoe for another outfit.

The platform loafer and lug sole bring weight and height to a classic low shoe. A slide takes the idea in a more casual direction: a broad band across the foot and a thicker sole.

Hardware is the thing to look for here. The Nerissa from Sam Edelman has two gold-tone buckled straps on woven raffia, which I would wear with cropped denim before the weather turns, and the Hoda from Franco Sarto puts a gold-tone ring on a white leather band over cork. The Dayna from Stuart Weitzman is an ivory leather crossband on a block heel with a platform. The Arwen from Steve Madden is plain black leather on a flatform, and the Sunpeak from SOREL has a jute-wrapped platform with a suede crossband.

Fitting test: stand still and look at the band. It should hold the front of your foot without gaping, and the sole should flex a little at the ball. Walk the length of a room, because a platform that clunks is not worth wearing.

Pairing idea for October: a long wool skirt, a thick sock tucked in, and a black slide.

What I would skip: the Slinky30 in stretch fabric when you want a leather look.

Backless loafers wear more like slippers than closed-heel shoes, so material and footbed matter. Without a heel counter, a comfortable fit depends on the vamp holding the foot securely.

The Wanda from Gentle Souls by Kenneth Cole is smooth black leather with a squared toe, easy under wide trousers. The Mocktail II from Seychelles is a pointed chestnut mule on a low stacked heel. The Noddy and the Owlet from Beek both use a memory-foam footbed, with the Owlet in glossy coffee leather and a penny keeper. The Lexi from rag & bone has a gathered leather upper, a penny bar and a moc-stitched toe, adding texture to the low-profile shape. The Goddard from Jeffrey Campbell in black leather and the Lynzi from Marc Fisher LTD, with a woven leather upper, also belong in this group.

The shared appeal is the low, backless leather shape. I would add a gold chain or a small hardware piece of your own on the sock, not on the shoe, if you want a hint of shine.

Test: slip one on, and walk up a flight of stairs. If your heel lifts out, size down or choose a snugger last.

What I would skip: the Inez in patent sheepskin for rain, since patent shows scuffs.

Lug-sole loafers pair a substantial rubber sole with a structured upper. Add a bit across the front and the shoe feels polished while still working with the boots-and-knits part of the year.

The Orianna Bit from Clarks is black leather with a silver-tone bit and a chunky lug sole. The Eugene from Gentle Souls by Kenneth Cole is mushroom suede with a slim gold-tone bit, which is the one I would reach for with gray flannel. The Abbi from EOS Footwear has geometric bit hardware and a tan-stitched sole that reads as two-tone. The Galilee from Donald Pliner has a silver-tone ring bit on black suede with a patent strap, and the Levett from Steve Madden has a gold-tone bit across the vamp. The Leah from Coach in black patent and the Lea from Sam Edelman, with a gold-tone bit on a lugged sole, round things out.

Check the sole by looking at the side: the lug should be molded and even, with a clean seam at the upper. Then the bit. A polished metal bit that matches the finish on the rest of your jewelry looks planned.

Wear them with a short skirt and thick tights, or with straight denim rolled once.

What I would skip: the Ezra in black synthetic if you want a leather feel at the toe.

I would decide on the shape first. If you want the backless slip-on, begin with the loafer mules in the first group. If you want a shoe that holds your heel, choose a snaffle-bit loafer. The lug sole and platform are for days when you need a little height.

Then check the leather, the bit, and the fit, in that order. Gold or silver, pick one and stay with it across your bag and your jewelry.

Across these styles, one small metal detail can change the feel of a simple loafer. Choose the proportion and sole that work for you, then wear it in a finish that fits your wardrobe.

If you love Gucci's horsebit mules, I think these pieces are worth a look too. If you want to keep browsing, I also put together Gucci Slides and Mules and Slides for Late Summer.