First of all I have 4 pairs of Oofos slippers, I have had them for at least 5 years and they are still in good condition. I received them on June 6th, 2019 and exactly 4 months later the soles on both shoes were worn out. I really like these shoes (although they are quite ugly) and thinking that maybe I got a lemon out of a pair I ordered another pair hoping for a better product. I contacted the seller, asked for some kind of guarantee and am waiting for their answer. Great shoes BUT my first pair didn't last!