Aqua Chimp’s basic framework consist of an over- and underwater steel construction and big HDPE floats, similar to an open sea buoy. HDPE creates no harmful emissions during its production or during its use by the consumer. Also, HDPE leaks no toxic chemicals into the soil or water. In between the buoys there are exchangeable climbing elements, the so called “features”. They consist of steel core polypropylene ropes (PP) and recycled plastics. Polypropylene is approved for use with food and beverage storage. Polypropylene plastics can be re-used safely.