I agree with a previous poster....the memory foam is very slippery! I've had these shoes in black and gold, with the &#34;rubber&#34; insoles. After my puppy chewed the black pair, I purchased another. I have always considered these shoes a fantastic choice....comfortable, stylish and a nice height (I am not a fan of flats). In these, I feel as if I'm going to slide out of them, at any moment. I did not realize the difference, when I purchased them. I am very comfortable, walking in all types of shoes, including 4-5&#34; high-heels. These do not work for me.