For those of us who can't faff around with sitting around the house with a hair mask in, the Amika Flash Instant Shine Mask (£20) — which launches on 5 Aug. — adds intense levels of moisture and shine to your hair in just 60 seconds. Meant to be applied after shampooing and rinsed out after a minute, the deep treatment (which contains flax seed, amino acids, and sea buckthorn berry) can replace your conditioner if you have fine hair and be an extra smoothing and shine-enhancing step after conditioner if your hair is thick and dry. Oh, and like all of the brand's products, it also smells really, really good.