What is Silk?
Silk is a natural fibre. Silk is the result of silkworms forming their cocoons and the cocoons being unwinded to produce the threads used to make the fabric.
What is Satin?
Satin is a weave and not a material. A combination of multiple raw materials (nylon, polyester, silk etc), satin is a manmade material.
Note: a fabric can be both silk and satin at the same time!
The Pros & Cons
At the end of the day, it's all about what YOU want and what YOUR goals are. If you invest in a silk material you will be getting all the benefits without exposure to chemicals and the process of producing manmade materials associate with silk. Especially with OEKO-TEX Standard 100 certified silk products.
Keep an eye out for these on your product labels!
As for cotton... the chart speaks for itself!