I bought some for my husband for Father's Day as a joke and told him if he wears them, I won' be able to say he doesn't do any cleaning around the house! I bought some for me just because I thought they were cool. I have all hardwood and ceramic floors and 2 cats. I don't think they particularly pick up the cat hair. Maybe it's because the hair accumulates behind my furniture. But they do help clean the floor and keep my feet clean. I have washed in the washer and dried in the dryer. My feet are very narrow, so I wanted to shrink them. I didn't see a difference after drying, but I have lots of room so I can't really be a judge on shrinkage.