Spine Eyewear is inspired by the human spine. The hinge used was invented by Italian designer Guido Medana who has spent his entire career in engineering. It has micro injected metal hinges that is patented w/ zero screws involved. There are 5 working Spine vertebrae that works together to offer a 90-degree hinge opening as well as rotate 18-degrees to reduce friction in the arms of the glasses bending drastically. This increases the limit in which these glasses can bend/open up as well as allow the hinges to keep arms closed whenever not in use.
The Spine sample I received was a pair of nice shades. Definitely as flexible as advertised. And can withstand your big-headed or wide-faced friend (we all have one) wanting to try them on w/o ruining them. The only thing getting used to is when it automatically closes when you take it off. Other than that, nothing bad to say about these. I hope to see this tech adapted into more glasses on their inventory as well as outside of Spine.
