Lora trained on 26 images of men wearing black balaclava masks, AKA ski masks.
Best results seem to be on a strength of (0.8) - Trigger with a phrase such as "man wearing a balaclava ski mask" or sometimes simply "balaclava mask", the latter working best to eliminate snowy and cold backgrounds.
The pictures used in training featured the style of mask with 3 holes for eyes and mouth, although results may vary depending on prompts and models.
Link to the female version: https://civitai.com/models/186017?modelVersionId=208872