Hi, please be honest with me. Is this really strap 100% Non-Slip?

100% is tough to match. I will say it's pretty good. It has holders at (plastic or rubber, not sure which) the end of the string to make it hold much better than just string.

Has anyone tried them on while riding rollercoasters ?

I have not used them on a rollercoaster but they are the best eyeglass straps I have ever used. They are very secure and are adjustable so you could tighten them up before going on. I would be very surprised if they didn’t work on a rollercoaster.

What is this eyeglass holder strap made of?

Our eyeglass holder around neck is made of premium-class nylon and non-clip thread, so you will be pleased with the quality and the durability of our eyeglass cord.

where are these made?

Thanks for your question! These are developed and designed in the USA and made in China under our strict control Please let us know if you have any other questions.

Manufacturer	SIGONNA
Part Number	EHCC093STR4PC
Item Weight	1.76 ounces
Package Dimensions	7.28 x 3.94 x 0.79 inches
Item model number	EHCC093STR4PC
Size	4 Count (Pack of 1)
Color	Black
Style	Classic
Material	Spandex
Pattern	Solid
Item Package Quantity	1
Batteries Included?	No
Batteries Required?	No

SIGONNA

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