Apeks 1st & 2nd stage Regulator with Octo Combo. The Ocea is the first of its kind – an environmentally-conscious regulator made from recycled materials and bio-plastics, manufactured in a solar-powered facility. Based on the XL4+, every single material and process was reconsidered to create the most eco-sensitive scuba diving regulator in the world. The Ocea is a truly game-changing regulator that removes five times its own weight in plastic from the environment.