Cotton grabs your hair and twists it at the root throughout the night, damaging hair and causing bed-head in the morning, whereas slipsilk™ is so gentle on your hair, it allows your hairstyle or blow-dry to last overnight. Unlike cotton, which draws moisture from your face, hair and scalp, slipsilk™ breathes and is a natural temperature regulator. Slipsilk™ is specially-commissioned and made to Slip's exacting standards, developed and refined over ten years to provide the ultimate combination of shine, thickness, softness and durability. Slip uses the highest grade (6A) long-fibre mulberry silk, with a thickness of 22 momme and enforces the strictest quality guidelines, including non-toxic dyes.