Melting Man is one of the two skins released in the multi-part Mino's Christmas Special offer. It could be purchased as part of an item deal in mid December 2018.
Melting Man could be purchased for $9.99 in a limited time deal that included 25000 coins, 1200 DNA and the Crazy Rudolph skin. This skin was not available for individual purchase and may not be available for purchase in the future.
Details of this skin may vary depending on location, platform or time.