@mdb as an FYI for those not in the know. Dive Rite purchased the Apollo Prestige molds and that is what evolved into the Dive Rite XT. They've made some material changes and obviously changed the straps, but the molds are still the ones Apollo used.
@JamesBon92007 plastic isn't always what you think of as plastic. I'm a textile engineer, so here are some interesting examples of plastic that you may not be aware of.
Basically all of your clothes. Polyester and Nylon are plastic
Rugs, most rugs are made of nylon these days
Your BCD-again made of nylon
These are not things that we typically associate with "plastic" like lego bricks or tupperware. Silicone is halfway between rubber and plastic.
Now, fins like the Apollo Prestige as mentioned above, the Dive Rite XT's, OMS slipstreams, and Deep6 fins are made out of something called Monprene or monoprene. There are different blends to grab different properties. Deep6 and OMS go for more of a silicone or rubber type feel where the Dive Rites are more plastic feel. This comes with pros and cons as the stiffness is adjusted.
They are more durable to wear and UV, and have stronger tear resistance *you don't see torn foot pockets in OMS slipstreams but you do with Jet fins all the time. Dive Rite has them but it's more because of how thin the foot pocket is* as compared to natural rubber. They are also able to be formulated to adjust the density. Monoprene is a mix between polypropylene or polyethylene *that float* and styrene butadiene *aka buna same stuff we use for o-rings and is also used for shoe soles, car tires, etc*.
Not something that is going to feel cheap and plasticky like you may expect. These fins feel more like silicone than anything else