The most reliable test for real versus faux fur needs no tools, no flame, and no expertise. Part the hairs with your fingers until you can see where they meet the base. Real fur grows from a leather skin, pale and smooth like the back of a glove. Faux fur is attached to a woven and knitted fabric backing, rows of threads with the fibers looped through it, like the reverse of a carpet. If the base looks like cloth or plastic netting, it is almost certainly fake. If it looks like thin leather, it is almost certainly real.
That one check settles most pieces, and it settles them in the store, before money changes hands. The rest of the tests exist for the pieces where the base is hidden: a lined coat, a trimmed hood, a pom-pom sewn tight to a hat. Each one is a separate piece of evidence, and the honest approach is to stack two or three of them instead of trusting any single one.
Only do this on a piece you own, and never on the garment itself. Snip a few hairs from a hidden area, such as the inside of a hem, hold them with tweezers over a non-flammable dish, and touch them with a flame. Keep water nearby, work away from fabrics, and do not hold the hairs in your fingers.
Real hair singes, curls away from the flame, and smells like burnt hair, and it leaves a fine ash that crumbles between the fingers. Synthetic fibers melt and shrink, smell of plastic and chemicals, and leave a hard, dark bead. The difference is chemical, not cosmetic: real fur is keratin, the same protein as your hair, and it burns like hair. Faux fur is usually acrylic or polyester, and it melts like plastic. Under a microscope, real fur shows cells and synthetic fur does not, but nobody carries a microscope to a coat sale, and the burn test is the field version of the same fact.
Push a pin through the base and feel the resistance. A pin pushed through real fur meets the resistance of leather; on faux fur it slips through the fabric weave. That test works on the same principle as the base test, and it works where the base is hard to see. Two more details help. Real fur has two layers of hair, long guard hairs over a soft underfur, and each hair tapers to a fine point. Synthetic fibers are often cut blunt at the tip and run uniform in length and color, because a machine made them identical. Unless they have been sheared or cut, animal hairs taper, and synthetic hairs do not.
The touch test is the weakest of the set and the one people trust most. Genuine fur is usually soft, smooth, and dense like a dog's or cat's coat, and the hair parts easily as your fingers slide through it. Cheap faux fur can feel coarse, and if your hands are damp it sometimes sticks to your fingers. But good faux fur is deliberately soft, and softness alone proves nothing. Part the hairs, look at the base, and if you still cannot tell, the pin and the burn test will. A piece that passes all three is real. A piece that fails the base test was never in doubt.
Keep reading: Superfake Handbags: When the Copy Passes the Eye Test, Faux Leather, Vegan Leather, and the Labels That Mean Nothing, and PU vs PVC Faux Leather: The Coating Decides Everything cover the nearby cases in this series.
Part the hairs and look at the base. Real fur grows from a leather skin; faux fur is attached to a woven fabric backing. A pin pushed through the base meets resistance on real fur and slips through easily on faux.
Real fur singes, smells like burnt hair, and leaves crumbly ash. Synthetic fur melts, smells like plastic, and leaves a hard bead. Only test hairs snipped from a hidden spot on a piece you own.
Yes. Real hairs taper to a fine point and vary in length, with long guard hairs over a soft underfur. Synthetic fibers are usually cut blunt at the tip and run uniform in length and color.
Not on its own. Genuine fur is soft and dense, but good faux fur is deliberately soft too. Use touch as a hint and confirm with the base test, the pin test, or the burn test.