A quasi-liquid layer, consisting of highly mobile water molecules, exists on the surface of ice even at temperatures below freezing, which contributes to its slipperiness.

“it's that there is always a presence of what they call a quasi-liquid there's always this ultra thin like just a few nanometers thin layer of quasi-liquids which Daniel Bond the scientist who wrote this paper in 2018 would not let me call a liquid a quasi-liquid and that exists on Ice even at temper”