https://starwars.fandom.com/wiki/Cold_assault_stormtrooper

Cold assault stormtroopers, also known more simply as snowtroopers, were Imperial stormtroopers trained to operate in arctic climates. Some snowtroopers were deployed under Death Squadron's Blizzard Force, as well as other arctic forces.

The snowtroopers were the successors of the clone cold assault troopers and the Galactic Marines under Clone Commanders Keller and Bacara, respectively, during the Clone Wars.