Every SIN set and every single piece is premium Italian leather on zinc-alloy hardware. That makes this guide short, because one routine covers everything we make, from a single PEARL cuff to the eleven-piece BONE set.
Leather is the less forgiving material, and it rewards the few minutes you give it. Here is all of it.
What you own
| Edition | Material | Hardware |
|---|---|---|
| BONE | Premium Italian leather | Zinc alloy |
| PEARL | Premium Italian leather, banded with pearls | Zinc alloy |
| KEEN BOUND | Premium Italian leather, woven through gold plaques | Champagne-gold zinc alloy |
| CRYSTAL | Premium Italian leather | Zinc alloy |
The individual pieces are built exactly like the edition they come from.
After every use
Wipe the piece with a soft cloth, barely damp with warm water. Nothing else. No soap unless the piece genuinely needs it, and never a household cleaner.
Then dry it fully before it goes anywhere near the case. This single step matters more than everything else on this page. Trapped moisture is the most common way a set is quietly ruined: nothing looks wrong when you close the lid, and the damage shows up weeks later.
Dry the hardware separately, and do not leave it resting against damp leather.
Conditioning
Leather holds moisture, it dries out, and it does both faster than people expect.
A light leather conditioner, applied sparingly and buffed off, keeps the surface supple and stops the fine cracking that appears first at fold points (the inside of a cuff, the place where a strap turns through a ring). How often depends on use and on how dry your home is. Condition when it starts to feel dry rather than on a schedule.
Leather also changes with use. A little softening and some colour movement at contact points is the material settling in, not wearing out.
What leather will not forgive
Soaking. Submerging leather is not cleaning, it is water damage, and drying it afterwards without distorting the shape is difficult.
Fast drying. A radiator, a hairdryer or direct sun dries leather far faster than it can cope with. The result is stiffening, then cracking, and it is permanent.
Chemicals and machines. Alcohol, solvents, bleach and household cleaners strip the finish and pull the oils out of the leather. Never machine wash and never tumble dry.
The hardware
Every SIN piece runs on zinc-alloy hardware, chosen because it is hypoallergenic. It asks very little: dry it separately so the finish stays even, and keep abrasives away from it. Polishes and metal cleaners are unnecessary and will dull a finish rather than improve it.
If a ring or clasp starts to feel gritty in use, that is almost always residue rather than damage. A wipe with a barely damp cloth and a full dry usually resolves it.
Storage is half the job
The fitted case is not packaging. Each piece sitting in its own recess stops pieces pressing against each other, which is what marks leather over time, especially where hardware rests on it.
Store the closed case somewhere dry and out of direct sun. A closed case keeps light and dust off the leather, and light is what fades it unevenly over a long enough period. Never store anything in a sealed plastic bag; plastic traps the moisture you just spent time removing.
What ruins leather fastest
| Mistake | What it does |
|---|---|
| Put away damp | The most common cause of damage, and it shows weeks later |
| Heat drying | Stiffening, then permanent cracking |
| Alcohol or solvent | Strips the finish and dries the leather |
| Machine wash | Never, under any circumstances |
| Skipping conditioning | Gradual drying and fine cracks at the folds |
| Long exposure to sun | Uneven fading |
The short version
Wipe it, dry it completely, put it back in its recess, close the case, keep it out of the sun, and condition it when it feels dry. Almost everything that goes wrong comes from skipping the drying step.
Our full care reference lives on the care page. If you are still choosing a set, the buyer's guide and the edition comparison set the four signature sets side by side.
Leather matters most on the pieces worn against skin longest. See collars and the wider BDSM gear range.
