Rearz Safari uses Polyethelene, which is as close to polyethylene vinyl acetate of the reusable waterproof pants as you can get.
The reason they haven't used Polyethelene in diapers for 20 years is that it doesn't decompose quickly when introduced to ultra-violet light, and therefor doesn't degrade in managed landfills. It's also super expensive.
If you want the tactile feel of the reusable vinyl pants, buy Rearz.