What shampoo (product) do the professional salons use to wash our hair exactly? I can NEVER get my hair to feel the same at home:[?

My hair is Paul Mitchell salon colored / highlighted. But after getting home, & using high quality expensive shampoos like Paul Mitchell, Nexxus, and Biolage, my hair again feels like straw every time i wash no matter how much conditioner i use, this applies to everywhere i go - i travel a lot, so its not a hard water issue. (i even bought a H2O filter for my shower at home) I can never ever get that silky lightweight look or feel back-- like right after its been done at the colorist. I have tried sulphate free shampoos, again, no difference, hair still straw-like / dry.

Do they put something extra in our hair during the conditioning phase to make it so silky smooth / soft?

Now, because my hair is baby fine thin/ has no volume or thickness, I do use a lot of hair spray just so my hair stays in the shape it was cut in, otherwise it would look like i stuck my finger in a light socket (dry). I don t put any other product in my hair other than the spray. I only use shampoos specifically for colored hair- but its not the clarifying type.

I spend a lot of money on coloring and amazing cuts, and want it to look like it did when i left the salon. Thanks.