Sam McKnight's product line may just include four products, but all four of the products are incredible, especially the Hair by Sam McKnight Lazy Girl Dry Shampoo (£19). It's one-part hair refresher — sopping up excess oil and leaving behind a floraly-green scent — another part hair styler, adding volume and texture to limp strands. And because the powder mist is so fine, even brunettes won't see a hint of white residue or flakes. — Sophia Panych, content director