The Ice/Frost giants of the dimensional realm of Jotunheim are one of the many types of giants that were in a constant state of war with the Asgardians. Jotunheim, one of the nine realms in the Asgardian cosmology housed many giants. In fact Odin's palace Valhalla was said to be built by one of the giants.
Ymir was said to be the first of the Ice giants followed by rulers like Utgard-Loki and the now deceased Laufey.
These enormous giants have shown extreme durability in combat as well as the ability to survive the weather extremities of Jotunheim. They have often held their own in battle against the Asgardians though they have not been very successful.The giants have shown the ability to manipulate ice as projectiles, balls etc. ...
The Frost Giants have a weakness to heat. When they are exposed to high level of temperature they will start to melt, when they return to low temperature or to Jotunheim where the temperature is very low they will start to regenerate.