T.A.
It's a continuation of her last question :)
It's a sea salt spray for texture, I can't live without mine! My favorite is from seven salon in Seattle, but yes I love the bumble and bumble surf spray also. And the John Frieda one too if they still make it. Haven't tried others but I'm sure they're all similar! Ulta has a good selection of the higher brand ones and cheaper ones. The good ones also have a bit of oil in them so not sure how the plain salt and water one would be, might dry out your hair.
I use it wet then braids or a bun while it dries and have amazing waves when I take it down. Or use it on dry hair for texture. Love the stuff, life's a beach! I can't make it to the beach much these days but I can look like I did!
And for dry shampoo my hairstylist swears by psssssst! It's cheaper than others and available almost everywhere (drug stores, mass retailers, etc).