The gold fabric has been interesting to sew with... and certainly not the most difficult fabric with which I've worked. The best description of it I can find is:
"Two way stretch fabrics are fabrics with Spandex/spandex and have approximately 75% stretch. Swimwear fabrics of Nylon/spandex usually have the most stretch on lengthwise grain, Cotton/spandex has most stretch on crosswise grain and is suitable for swimwear, activewear, dancewear, leotards and leggings."
Photo taken without flash.
The "gold" whatever is rubbery and, when right sides are together, almost sticky. There wasn't much sliding around but I did use straight pins to align the edges since the 75% stretch was a concern.
Photo taken with flash, closer to the color the gold fabric is.
If I had to make a lot of these, I would have tracked down and purchased the type thread used for swimsuits.... and used a serger.
...and if you believe that, I have some swamp land in Florida I'd like to talk to you about! *snicker*
The robot outfit is in the mail to Henry of the Big Imagination....
I'm glad the helmet/head/hat/what ever is his and his mother's responsibility!