Clementine Sleepwear won Boutique Picks by Mansion Global for 2023. They had this to say:
If they prefer to sleep in total darkness, the Sleep Mask Collection (sale price: $306) from Clementine Sleepwear includes five different colors made from non-toxic dyes like “Champagne Gold” and “Dusk.” The mulberry silk masks perfectly contour their face while providing 20% more coverage than standard sleep masks.
