100% Pure Silk Sleep Eye Mask / Light Out Eye Mask/ Natural Sleeping Mask for Women and Men Material: 100% silk for two sides Size: 8.3 x 3.7inches / 21 x 9.5cm Suit for both adult and child, strap adjustable, allow head circumference up to 25.5"/65cm The protein fiber of silk help your skin keep moisture, reducing the formation of wrinkles Three typical colors for choice for men and women