This beautiful set of rings has been designed to go either side of an engagement ring that was created with the same band.
The Mobeus is one of the most famous surfaces in mathematics. It is a non-orientable form. Meaning that there is no front or back, there is only one continuous side.
When you relate this concept to that of marriage, you can easily see how a union of unconditional love is likened to the mobeus concept, eternity, ever continuous.