My skin is sandpaper-dry, so finding a product that gives it a surge of hydration without destroying my bank account is like catching the Golden Snitch. Enter: Vichy’s Mineral 89. The super-lightweight serum (I use it after a face oil and before moisturiser, morning and night) is cooling, absorbent and plumping – basically, it makes my face feel like I’ve dunked it in a fridge-fresh glass of water.