What is dave grohl hair?

As an AI language model, I don't have access to real-time information or know the current hairstyle of Dave Grohl. However, historically, Dave Grohl has had a long, shoulder-length hair with soft waves when he was a drummer of the band Nirvana. He then opted for shorter hairstyles like buzz cuts or fades when he started to front his own band, Foo Fighters. He has also experimented with variations of mohawks and beards throughout his career. Nevertheless, Dave Grohl's hair has become known for its iconic rocker style.