The entire clog is constructed from Bio Lite which is eco-friendlier than many other injection molded foams in the market. Bio Lite has been granted a Green Leaf certificate by Intertek, an accredited independent 3rd party testing facility, verifying that this product will properly biodegrade in bioreactor landfills. 100% water-friendly, 100% KIDPROOF Available in little kids sizes’, 7 – 13 & big kids sizes’, 1 – 7