Most people have heard or read about what has been taught in TKM® classes and lectures about blends and synthetics. They're bad for your health!  I will be brief.  Many people are now teaching this truth from different perspectives, but it still is and has always been true.  The Bible states in Leviticus 19: 19 "Keep My decrees. Do not wear clothing woven of two kinds of material"
Aside from the dispute from some about whether this is relevant now or not, science, physics and electronic testing have consistently shown that blended fabrics of any percentage and synthetics have a negative effect on human health when worn or are in contact with the body.  
In physics, it has to do with interfering with the oscillations, wavelengths and frequencies of the human body (the energy) and close proximity causes disequilibrium and "incoherence" to these energy systems, which affect the biochemical and physical functions of the body. There are many ways currently that all conclude that blends affect your health negatively.  It is especially true when it comes to the electrical energy circulation, which is vital for proper health and health recovery.  
This is why we suggest changing to natural fabrics such as 100% cotton, wool, silk, and real leather. Not only clothes, but any fabrics that come in contact with the body such as all bedding, etc.  There could still be an allergy reaction to any of the natural items, which can be addressed with TKM®.  We find this to be vital for any health restoration program.
Opportunity for more shopping!