Definitely "biodegradable" if that means they will fall apart completely after two weeks of use...and feel slimy after about a week of use. To be honest the sponge looked broken after a week of use, I just kept using it while the pieces fell off because I wanted to get my money's worth. I definitely would NOT, but this is again and I absolutely do not recommend it. In the last two photos, a two-week sponge is next to a new one of the same brand. I really don't want to use the other 5 in the pack but I think it will be 10 weeks use at most.
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