My husband wears flip flops year-round. But we are in a cold part of the country right now. So, got these socks and he loves them. Says they keep his feet warm.

I use them for kyudo practice on cold winter day in the dojo. They have a slight tendency to slip but nothing worth worrying about.

These are amazing so far, ordered these for the split toe boots i got and theyre great for the current winter weather, as the boots are a single tough layer of, duck cloth/Kanvas, and these keept my feet warm even in the shin deep snow i walked around in for an hour to get a feel for them.