For example if you want some measurement; all you need is a good teasing comb and hair spray! Simple as that.
You can go for a more simple look also. Long curly hair is very grunge and easy to do! Also adding some color to your hair is very popular in this style. Sometimes just even rocking the "natural" look is so soft grunge! It doesn't take much. So if you're one of those people who are lazy about your appearance, you could totally do this easy and fun look! Soft grunge isn't just for girls either guys!
Can I just say Miley is a perfect example of soft grunge. Just look what a little hair spray and teasing can do!