"Operation Snowblind brings a flurry of new gear, including the limited-time Permafrost Weapon Camo. This winter weapon camo is perfect to stay frosty in the cold of Redwood Snow or blend in with the urban environments of Metro and Evac. The Permafrost Weapon Camo is only available in Rare Supply Drops until March 14th at 10 AM PT."
— Message of the Day Description
Permafrost Camouflage is a Limited camouflage featured in Call of Duty: Black Ops III that was added with the Operation Snowblind event on March 6, 2018. It is available for all weapons once unlocked. The Permafrost camouflage could have been obtainable from a rare Supply Drop between March 6th, 2018 and March 14th, 2018. The camo later made a return to the Black Market from September 17th, 2018 to September 24th, 2018.
The camouflage itself appears to be a mixture of the Jungle Party and Ice camouflages, primarily featuring a white and grey background animated background, featuring what appears to be small snowstorms on the gun. There are also blue streaks and shards of glowing ice around this as well.