'Satin Silk' is rarely real Silk
That's right, it's most commonly 100% polyester / nylon / rayon. We often see unscrupulous merchants trying to pass off their artificial products as silk - duping buyers with the term Satin Silk. You really do have to read the fine-print and press the seller for details on the material actually used if you see a product marketed under this term or a derivative of such.
Silk is a fibre. The process of weaving converts that fibre into a fabric.
'Satin' is the name of a weave - with a glossy surface and a dull reverse. It's created by floating a number of warp yarns over a single weft and so on. This causes light to refract differently to a plain weave, giving it the distinctive 'satin' look.
Unhelpfully, Satin can be made from any fibre so the term Satin, doesn't tell you what fibre is used in the weave. It could be silk, but most commonly when marketed as Satin Silk, will be polyester, nylon or rayon. If cotton is used it should be called Sateen.
When a merchant refers to their product being 'Satin', especially on places like Amazon, it's most likely to be weaved from a man-made fibre such as polyester (petroleum byproduct / plastic) as it's very cheap to make. It's often marketed under the term 'Satin Silk', yet there isn't a single strand of silk in the fabric. The term is used to deceive the average person into thinking they are buying silk for a bargain price, when in fact what they're buying is a plastic sheet that looks nice. Be sceptical of merchants using this term. Do your research.
If something looks too good to be true, it probably is.
'Satin silk' tries to imitate silk's natural beauty, suppleness and light refraction but that's where the similarities end. It's plastic, very slippery, creates static electricity and very hot to sleep in. It's not a pleasant experience sleeping on it after the first 30 minutes as the fabric heats and reflects the heat back. You will sweat, a lot, and it has very poor/no wicking ability. It's much like wrapping yourself in a plastic bag for the night. It might look nice on first glance, but it has none of the natural health and comfort benefits of real, high quality silk - hypoallergenic, antibacterial, temperature regulating, durable, sustainably produced or biodegradable.
Real silk, such as MayfairSilk, exhibits all those properties naturally. Sure it may be more of an investment initially but it's much more cost effective in the long run, especially when you consider your health and quality of sleep.
We hope the above is useful and helps provide a little more discernment when shopping for silk. Our mission is to introduce the wonders of sleeping in real silk to the world.