I want to prove that $[0,1] \times X \cong [0,1] \times Y$ where $[0,1] \subset \mathbb R$ has the usual Euclidean topology, $X$ is a Möbius strip and $Y$ is the curved surface of a cylinder. Here, $\cong$ denotes that there exists a homeomorphism between the two spaces.
I know how to express $X$ and $Y$ as quotient spaces of $[0,1] \times [0,1]$ but I'm stuck on what to do next.
From the comments above.
Orientability is preserved under homeomorphisms and it is a general fact that if $X$ is non-orientable and $Y$ and $Z$ are orientable, then $Z \times X$ is non-orientable and $Z \times Y$ is orientable. In your case, we have $Z = [0,1]$, $X = $ Möbius strip and $Y = $ curved surface of cylinder. So, $$ [0,1] \times X \not\cong [0,1] \times Y. $$