Nineplus Men's Full Suit
Nineplus does a great job designing suits that walk the line between warm, stretchy Yamamoto wetsuit and a durable wetsuit. This is a great entry level wetsuit for someone who has not become familiar with the delicate Japanese rubber as it is far more durable than many of its slick skin cohorts.
Yamamoto rubber is derived from Limestone and is over 99.7% calcium carbonate compared to petroleum based neoprene manufactured by most other mainsteam wetsuit companies. Yamamoto is as environmentally friendly as possible in relative terms of wetsuit production, not just in its makeup but mostly in the production technique which is the most damaging aspect of neoprene production.
Using calcium carbonate foam is much cleaner and more eco-friendly because it does not use petroleum as the important resource, instead it uses used car tyres. The heat used for processing and producing the raw materials is 1/10th of that being used for refining the petroleum based equivalent neoprene which most use. Furthermore the generated heat which is used in production is then used to nurse eels, a major source of food within Japan. The source of the heat used in the factory is from burning used tyres within a controlled environment made possible using electricity derived from water turbines powered from mountain streams. The way Yamamoto covert the limestone to neoprene is considered the most environmentally clean route in relation to how the product is generally made.
Yamamoto neoprene is not derived from petrochemicals in anyway, it is from limestone taken from the mountains within Japan in the same way concrete is made. There is estimated to be enough reserves to last another 3,000 years so it is not necessarily a renewable resource but there's a lot of it... maybe we'll even have a whole new way of producing wetsuits but then if the human race can manage to maintain a habitable planet. By utilizing hydroelectric power the greenhouse gases are kept to an absolute minimum and by recycling the heat for farming the production process is as conservative as possible.