I gave these great slippers my girlfriend for 24 (!!!!) birthday. She was very enthusiastic and it has the whole day (it was 28 degrees C) kept on, because as she says "wiggle eyes so funny". The shoes are well made, perfectly fit in size 39 and are very comfortable. By "knobs" on the bottom and the risk of falling is very low. Just to say that you get very neat sweaty feet in the things that has not only located on the outside temperature. However, I and especially my girlfriend am very pleased with these funny "companions"