I made myself a sweater last year that was about 50% Alpaca and 50% llama wool. It was lovely to work with and very warm and soft. But...it sheds a LOT- blue fuzz gets all over me whenever I wear it. I'm not sure a guy would like that. Mohair yarn sheds the same way. I would recommend "regular" sheep wool for a guy's sweater, in worsted weight. Cascade brand is a very good price.