After a couple times of soaking my feel in the shower and scrubbing the callouses, I no longer have the thick, bleeding, painful, and cracked skin that has plagued me for years. The bottoms of my feet are the softest they have been in years. It took a little effort and scrubbing but I noticed the difference after only one try with these pumice sponges. The painful, cracked heels are a thing of the past! I am thrilled with these pumice sponges and highly recommend them.