In 2003, Slip founder Fiona Stewart found herself suffering from sensitive skin and thinning hair resulting from an acne medication she was taking. As a remedy, her dermatologist suggested sleeping on a silk pillowcase, which is far more gentle on skin and hair than cotton. Unable to find one, she sourced the finest silk and wrapped it around her pillow. The results were dramatic and immediate, and soon her friends and local shops were requesting her pillowcases. Using specially commissioned long-strand mulberry silk at a durable 22 momme (weight) and non-toxic dyes, Slip is the ultimate silk pillowcase.