- Duramax is polyester/PBT
- PolyFlex is Polyester/Spandex
Duramax stretches less than PolyFlex, a Duramax swimsuit will not fit as many body types as a PolyFlex swimsuit.
Duramax is more chlorine resistance than PolyFlex, a Duramax swimsuit will last longer in the water than a PolyFlex swimsuit.
A Duramax and a PolyFlex swimsuit unlined may be transparent.
PolyFlex fabric snags more than Duramax fabric when in contact with rough surfaces.
Duramax is a manufacture with recycled material.