I got mine, too.
I don't know if it's real silk or not, but it soundly failed the EM blocking test I put it through. I wrapped it around my meter and exposed it to various signals. I tried numerous different approaches and arrangements, and it made no difference whatsoever. (I did, however, learn that my hands can block 4G cell phone RF just fine. -To be expected as human flesh absorbs EM rather well).
But the beanie did so close to nothing that it's not relevant.
I conclude that either it isn't real silk or, (and I'm thinking this might actually be a real possibility), the C's were thinking ahead to the 5G paradigm and it will be quite effective against millimeter waves. I look forward to testing again when that tech starts to invade my environment and I manage to get my hands on a meter which reads up into the 30 Ghz range.
The last possibility is that the C's were just wrong or were leaving out some important detail.
Have you tested the silk whilst wearing it? I am wondering if it is only effective if it is worn on the body. That is, the physical body and the silk are affected by EM waves if they are separate from each other but if they are together i.e. the silk is worn, then the silk offers the body some protection. Perhaps, also, the silk needs regular contact with the skin of the body to gradually build up resistance to the EM waves, not unlike the Q Link is purported to work.