Silk Willow is a beauty wellness brand based in Indonesia that aims to elevate your daily self-care ritual. Silk is now a key component of our beauty regimes - especially when it comes to sleep. Silk Willow silk pillowcase is made from Pure Grade 6A Mulberry silk in 22 Momme: high-density silk weight with finest grading silks. Why sleep on silk? They reduce wrinkles, keep your skin and hair hydrated, and prevent acne.