Patagonia's R2 Yulex Regulator full wetsuit is made of 85% Yulex natural rubber and 15% synthetic rubber — neoprene-free. The 3.5/3 mm suit targets 55–60°F (13–16°C) water, in back-zip, front-zip and hooded versions.
• Brand: Patagonia — outdoor apparel and surf equipment. • Product: R2 Yulex Regulator full wetsuit, 3.5/3 mm, for 55–60°F / 13–16°C water. • Materials: 85% Yulex natural rubber / 15% synthetic — neoprene-free construction. • Relevance: the reference sustainable wetsuit for cold-water surf and swimming. • Source: official Patagonia product page.