Zoe Foster Blake, founder of Go-To Skin Care, says what we choose to rest our head on at night also affects our skin. It's why the latest addition to her Go-To beauty line happens to be a silk pillowcase designed to minimise friction between the skin and fabric (a godsend for belly sleepers) and therefore avoid morning creases, which can lead to wrinkles over time. "A silk pillowcase won't absorb moisture from your skin, or cause friction between your skin and the pillow. Plus [you'll have] frizz-free, silky hair," she says.