How we test products
Our mission is to take the guesswork out of finding the perfect sleep products.
We've dedicated hundreds of hours to testing mattresses and sleep accessories, and rely on a team of testers of differing weights, temperature preferences, and sleeping positions to evaluate each product.
Tested products are granted the Sleep Hero tested stamp of approval, a mark of our review's reliability.
If we haven't personally tested a product, please be assured that we invest significant time and energy into scouring the UK market and researching the best recommendations, and we work with a team of sleep experts who review our articles, ensuring that the insights we provide are not only relatable but also reliable.
What are silk pillowcases?
Silk pillowcases, as the name suggests, are simply pillowcases made from silk.
These have become enormously popular in recent years due to their wide range of apparent beauty benefits.
Silk is a natural protein fibre composed of fibroin, most commonly produced by silkworms to form cocoons.
The best-known silk is won from the cocoons of the mulberry silkworm. 🐛
Silk itself is a luxurious, shimmering fabric that’s soft and smooth.
Satin looks and feels similar but is not a natural fibre.
Regardless, it is often marketed as equal to the best silk pillowcases UK, though it won’t have the full range of beauty benefits.
Let’s look at these next.
What are the most common types of silk?
Although often thought of as a single material, silk can actually refer to a variety of different fabrics, each with its own unique properties.
You're likely to find a range of different types of silk, including 100% silk, mulberry silk, silk charmeuse, silk satin, silk chiffon, or silk crepe.
Of these, 100% silk and mulberry silk are the most quality materials, while many of the other silk descriptions refer to various weaves or satin finishes.
What is 100% silk?
One of the most popular types of silk is 100% silk, which is made from the long, strong fibres that make up the cocoon of the silkworm.
This type of silk is known for its exceptional strength and durability, making it an excellent choice for clothing.
However, it’s also quite expensive, which is why you might not see it used as often in home decor items like pillowcases. 💷
What is mulberry silk?
Mulberry silk is another popular type of silk, which is made from the shorter fibres that are found in the innermost part of the silkworm's cocoon.
This type of silk is prized for its softness and lustrous sheen, making it a popular choice for luxury items like pillowcases and bedding.
Mulberry silk is often classed as the most high-quality silk you could invest in. ⭐️
Pure mulberry silk pillowcases like the Alaska Bear pillowcase may be more expensive, but they are well worth the investment and deserve a place on your wishlist.
Are silk pillowcases expensive?
Silk pillowcases can be relatively expensive, depending on the type of silk and where you purchase it.
However, silk pillowcases are lasting investment pieces that can provide beauty benefits, a luxurious feeling, and good night's sleep for years to come.
When shopping for silk pillowcases, be sure to look for quality materials like 100% silk or mulberry silk.
Avoid cheaper alternatives like satin or polyester, as these may not provide the same benefits.
To get the most bang for your buck, look for sales or discounts from major department stores or online retailers. 🥳
Some high-quality silk pillowcases, like the Jasmine Silk pillowcase, may have a cotton underside, which brings down the overall cost while still giving you the best results.
How to choose the best silk pillowcase
Although silk pillowcases may look similar, there can be very distinct differences in terms of quality and feel.
We'll help you figure out which silk pillowcases are worth investing in.
Make sure you're buying real silk pillowcases
There are many pillowcases sold as luxurious silk items, but they're actually cheaper polyester satin or polyester microfibre covers.
Silk is a fibre, and satin is the weave.
While many real silk pillowcases are also satin, you'll be able to find satin pillowcases made of polyester for a much lower price.
Mulberry silk is the highest quality silk you can find - think of it as the Egyptian cotton equivalent of silk. 🏆
Mulberry silk pillowcases, like the Kally Sleep pillowcase, should be your go-to option for the best beauty sleep.
Check the silk momme
Momme is the unit of measure for the weight of silk and can often be compared to cotton’s thread count.
Momme ranges from 6 to 30.
The heavier the silk, the higher the momme and the more durable it will be.
A silk pillowcase with a high momme count will also feel softer and more luxurious. 🤗
Most silk pillowcases are available in 19 momme or 22 momme counts, though occasionally you’ll also find slightly higher momme ratings.
The best-selling LilySilk options, for example, are available in 19-momme mulberry silk, 22 momme silk pillowcases, and even 25-momme silk.
Consider how the pillowcase fits
Since silk is such a smooth material, it may not fit as snugly as a cotton or polyester pillowcase.
Some silk pillowcases will use an envelope closure, where the fabric tucks into itself, while others will use a hidden zipper.
Silk pillowcases with a zipper tend to fit better, but make sure that the zipper is decently constructed, so it's easy to open and close and won’t affect sleeping comfort.
The Alaska Bear silk pillowcase has a zipper that's beautifully designed.
Check the washing instructions
Silk is delicate to care for.
While most silk pillowcases can be machine-washed, some do need to be hand-washed.
If you lead a very busy lifestyle and are unable to take the time out to hand-wash your pillowcase, it's best to look for a cover that's machine-washable. 🚿
Some silk pillowcases can be machine-washed and tumble-dried on a gentle setting.
Check the delivery conditions
While not directly related to the quality of the product, the delivery conditions of the brand you end up buying from do matter.
- Does the product come with free standard delivery?
- Is next-day delivery an option?
- Are additional shipping costs calculated upon checkout?
We prefer buying from brands that include free delivery and returns.
Are silk pillowcases worth it?
We’ve loved sleeping on silk pillowcases and wouldn’t want to go back to regular cotton.
Silk pillowcases may be more expensive, but if you care about the condition of your skin and hair or simply enjoy the gentle feel, they’ll be well worth the investment.