The material these are made out of is very cooling and comfortable.  On the down side, it is also not very durable.  They have a snap closure that does not come unsnapped easily.  The snap on the first pair I ordered pulled right through the material just trying them on...  Needless to say, I immediately ordered a replacement for exchange thinking that possibly the snap was defective on the first pair.  The second pair is just as hard to unsnap, but hasn't pulled through the material as of yet.  Fingers crossed.  They were very quick to send a replacement though. No complaints there.