For some reason I can't wrap it as a gift - any help?

thanks for info

Hi,

I'd like to trade my shadow flame set. I've noticed that there are some listing for it already - https://steamhost.cn/steamcommunity_com/market/listings/570/Shadow%20Flame. For some reason my set is marked as non-tradeable. I'm relatively new to trading dota 2 items and wanted to ask what is the problem and how can I fix it so that I can sell my item for cash and buy compendium that way.

Thank you