Something about the plastic, assuming it is plastic, that makes these Crocs sweat inducers. After all the material is nothing exceptional, even though the look and convenience is very nice. The material must be on the very cheap side, and one can only wish they came with a Crocs Classic that did not get so hot. I was happy to see at least one review where this problem is mentioned, and I concur with the reviewer's opinion. Yes, the look is good, they certainly are wearable, but what is the use if one now has to take a few showers more than expected, to alleviate sweaty socks, and do note I never had that problem before. I use them around the house, and make it mandatory to wear socks with them, for now I fear this material might be starting me up on the road to Dr. Scholl's Foot Odor Spray, something I never have used before. Great slippers for indoor moments. 2 Stars.