We believe in keeping our waterways as clean as possible. We redesigned our popular strike indicators with eco friendly foam so those indicators that end up floating away for any reason will break down over time.Specifications and Features: Not to be confused with "water soluble:" Air-Lock eco friendly Strike Indicators will not dissolve or be compromised in any way during normal use. Biodegrading happens when the material is left in the elements: mud, water, mulch, compost, etc. over a long period of time.