What would be a good hair thickening product for men?

I have real thin hair and I'm only 20 years old. I know hair thickeners don't really make your hair thicker; it just makes it look that way, but that's fine with me; I don't think I'm ready for a hair transplant yet. And do hair thickeners really make your hair look thick? if so, which one is best for men?What would be a good hair thickening product for men?
well my dad has thin hair and he uses herbal essence for volume