It doesn't matter if your hair is straight, wavy, curly, or straight, leave the Virtue Restorative Treatment Mask (£28) on your hair for 2-5 minutes and your strands will be immediately stronger, less frizzy, and easier to comb through when you get out of the shower. The secret (in addition to a combination of plant oils, plant extracts, and shea butter) is the brand's proprietary Alpha Keratin 60ku protein, which is a pure, whole, ethically-sourced human keratin protein. The molecule is identical to the keratin in your hair and because of that, it fits into damaged strands like a jigsaw puzzle, filling in the damaged bits and ultimately leaving your hair silky and soft — even if it actually looks like a broomstick.