Get the look:
To get that perfectly disheveled hair, there's a number of things you can do. One of our favorites is to let your hair dry 90% of the way naturally. When it's mostly dry, spritz it with some volumizing spray and then twist it up into two low buns on either side of your head. (Think Scary Spice's buns, except twist up all of your hair.) Sleep with your hair like this and when you wake up you'll have naturally voluminous hair. If you have thick hair that holds a curl really well, it's better to let your hair dry all the way, otherwise letting it set a little damp might give you crazy frizzy, big hair in the morning.
Another way to get natural waves that turn out more defined than the bun method is to braid your hair before going to bed. Doing this and then using a salt-based sea spray after finger-combing your hair once you wake up will make it look more natural than using a curling iron.
If your hair is naturally wavy, spritzing in some leave-in conditioner along with the aforementioned sea spray while your hair dries will give you unbelievable waves. Twist your hair a little bit between your fingers while it's still drying to define things a bit better, and you'll be on your way!
More favorites to achieve Roma's look:
Fatboy Perfect Putty Hair Paste
Not Your Mother's Way To Grow Leave-In Conditioner
Brooklyn Beach Hair Spray
Klorane Leave-In Spray With Flax Fiber