Every silk bedding brand advertises a momme weight, almost nobody explains what it means, and nobody tells you that you can check it at home in about ninety seconds.

That is where this THXSILK review starts, because momme weight is the only number in silk bedding that actually corresponds to something physical, and it is the number brands are most tempted to round up. If you are paying a premium for 22 momme, you should be able to confirm you got 22 momme.

You can, and the method is below.

Verdict in one minute

1. The products are real mulberry silk and most customers are satisfied. The Trustpilot score is 3.8 out of 5 across roughly 1,900 reviews.
2. Pricing is genuinely lower than the premium silk brands, and the 19 momme and 22 momme options cover most real needs.
3. The 30-day return window is enforced strictly. One reviewer was refused a replacement a single day past it.
4. Parcels are reportedly shipped without signature required, which is the root of most non-delivery disputes in the negative reviews.
5. Recurring quality complaints are pilling, a chemical smell on arrival, and static. The smell is usually fixable, the pilling is not.

What momme actually measures, and how to check it

Momme is a weight measurement, not a quality grade. One momme is the weight in pounds of a piece of fabric 45 inches wide and 100 yards long. Converted into something useful, one momme equals about 4.34 grams per square metre.

So 22 momme silk weighs roughly 95 grams per square metre, and 19 momme weighs roughly 82 grams per square metre. From there the arithmetic for a pillowcase is simple.

A queen pillowcase measures 20 by 30 inches. It has two faces, so the fabric area is 1,200 square inches, which is about 0.774 square metres.

1. At 22 momme: 0.774 x 95.5 equals about 74 grams of fabric. With the zipper and seam allowances, a genuine 22 momme queen pillowcase should land somewhere around 75 to 85 grams.
2. At 19 momme: 0.774 x 82.5 equals about 64 grams of fabric, so roughly 64 to 72 grams finished.

Put the pillowcase on a kitchen scale. If a case sold as 22 momme queen weighs 55 grams, it is not 22 momme, and no amount of marketing copy changes that. If it weighs 80 grams, the claim holds.

Two caveats so you measure fairly. Do it before washing, since silk picks up and loses moisture. And scale the maths if your pillowcase is a different size, because a king at 20 by 36 inches has 20 percent more fabric and should weigh proportionally more, around 90 to 100 grams at 22 momme.

This works on any silk brand, not just this one. It is the single most useful thing in this review.

The silk authenticity test, while you are at it

Separate question from momme weight: is it silk at all. Several negative reviewers doubted the fibre content, and there is a decisive test that takes one thread.

Pull a single thread from an inside seam allowance, somewhere that will not show, and hold a flame to it.

1. Real silk burns slowly, self extinguishes, leaves a brittle black ash you can crush to powder, and smells distinctly of burnt hair, because silk is protein.
2. Polyester and satin melt rather than burn, shrink away from the flame, leave a hard plastic bead you cannot crush, and smell chemical.

Do it over a sink. This is a standard textile identification test, not a trick, and it is far more reliable than feel, because a good polyester satin feels convincingly smooth to most people.

Silk pillowcases, including the hyaluronic acid version

Around $50 to $60 for a queen 22 momme case, depending on where you buy.

The core product and the one most people arrive for. THXSILK sells 22 momme Grade 6A mulberry silk cases with a hidden zipper, and an unusual variant treated with hyaluronic acid marketed for skin and hair.

Be clear eyed about the hyaluronic acid claim. A topical finish applied to fabric is not the same as a serum applied to skin, it will diminish with every wash, and no brand publishes how many washes it survives. If the HA version costs the same as the plain one, take it. If it costs meaningfully more, buy the plain 22 momme case and a bottle of actual serum, which will do more for your skin than a coated pillowcase.

On the Grade 6A label: this refers to the quality grading of the raw silk fibre, and 6A is the top grade. It is also a self applied claim on most listings with no certificate attached. Treat it as unverified unless the seller shows you the documentation, and rely on the momme measurement above instead, since that one you can check.

Silk sheets and duvet covers

The expensive end of the range, and where the strict return policy matters most. A silk sheet set is a multi hundred dollar purchase and silk shows its flaws in use rather than on arrival.

Two specific complaints appear in the negative reviews that are worth planning around. One reviewer reported pilling after a few weeks, and another reported a sheet that was defective and ripped. Both are failures that surface after the 30-day window has closed.

If you buy sheets here, use them hard in the first fortnight rather than saving them for guests. Wash them once within the window using the care instructions, and inspect the high friction areas, which are the fitted corners and wherever your heels sit. A defect that is going to appear will usually start there, and you want it to appear while you can still return the set.

Silk pajamas and sleepwear

Commonly 19 momme rather than 22, including the men's two piece sets.

Worth knowing that the sleepwear uses the lighter weight, and for once that is the correct choice rather than a saving. A 22 momme pajama would be heavy, warm and prone to holding its creases. Nineteen momme drapes better and breathes better, and for clothing that is the right trade.

So do not read 19 momme on pajamas as a downgrade from the 22 momme bedding. Different fabric weights suit different jobs, and a brand using 25 momme for sleepwear would be making a worse product, not a better one.

Silk eye masks, scrunchies and accessories

The low risk entry point. An eye mask or a set of scrunchies costs little, arrives quickly, and tells you what the brand's silk actually feels like before you commit to a sheet set. If you are unsure about the brand, this is the sensible order to place first.

It also lets you run both tests above on something cheap. Weigh it, burn a thread from the seam, and decide from there.

The two policies that cause most of the bad reviews

Shipping without signature

Negative reviewers repeatedly report parcels that never arrived, with one stating the company ships with no signature required and others reporting no proof of delivery. When a parcel goes missing without a signature on file, the dispute becomes your word against a tracking scan.

What to do: if your building or street has any history of parcel theft, use a work address, a parcel locker or a pickup point rather than your door. For an expensive sheet set, consider asking support in writing to add signature on delivery before they dispatch. A refusal is itself useful information.

A hard 30-day return window

Thirty days is a normal window, but reviewers describe it being applied without flexibility, including a refusal one day past it. The company does reply to around 80 percent of negative reviews, typically within 48 hours, though several reviewers say the promised follow up never came.

What to do: diarise the date your window closes on the day the parcel arrives. Do not plan to raise anything in week five.

Dealing with the chemical smell

Several reviewers mention a chemical odour on arrival, and this is common across silk bedding from most brands rather than specific to one. It usually comes from the finishing process and packaging rather than from anything wrong with the fibre.

It generally clears with one gentle hand wash in cool water with a pH neutral or silk specific detergent, followed by air drying out of direct sunlight. If it survives two washes, that is no longer a packaging smell and is worth raising while you are still inside the return window, which is another reason to wash early rather than late.

Worth buying if

1. You want real mulberry silk at a lower price than the premium silk specialists charge.
2. You are happy to verify the momme weight yourself rather than taking the label on trust.
3. You can receive parcels securely, or will arrange a collection point.
4. You will test the product properly inside thirty days rather than saving it for later.

Skip it if

1. You need a generous or flexible returns process. The window is short and firmly applied.
2. You cannot receive parcels safely and cannot use an alternative address.
3. You are buying primarily for the hyaluronic acid finish, which is unquantified and will wash out.
4. You want independently certified fibre grading rather than a self applied 6A label.

Final word

THXSILK sits in a useful gap: real mulberry silk at prices the established silk brands do not match, with a Trustpilot record that is good rather than excellent and a customer service posture that is strict rather than generous.

Buy a pillowcase or an eye mask first. Weigh it, burn a thread from the seam, wash it once, and decide inside thirty days whether to spend hundreds on sheets. That sequence costs under sixty dollars and answers every question this review could not answer for you.