This is less a paragraph on what thickness wetsuit to choose — entirely dependent on your location – and more about which Project Blank wetty would be right for you as far as dollars spent and environmental impact.There are three steamer suits to choose from. Their entry level wetsuit, the High Performance Steamer, is made from the least eco conscious rubber in the form of limestone neoprene. It’s basically the standard rubber material in wetty’s these days, after replacing the OG petroleum based rubber.Then there’s the Eco Performance Steamer which, in addition to being constructed of limestone neoprene, comes with 45 recycled PET bottles in every suit as well as recycled rubber taken from car tyres. The latter not only reduces landfill waste, but reduces energy consumption and CO² emissions by 72%.   Finally, there’s the Eco Ultimate Steamer. This suit employs the same amount of PET bottles as well as the recycled car tyre rubber, but the core ingredient is Yulex ‘natural rubber’ instead of the limestone based stuff. While limestone replaced the traditional petroleum based neoprene, it’s still not as green as some would have you believe, so Yulex is as good as it gets.  @Patagoniaaus Yulex rubber is made from the Hevea brasiliensis — the Brazilian rubber tree. This magical tree can produce rubber for up to 30 years and each resulting wetsuit emits 80% less carbon dioxide than a traditional neoprene equivalent.