Light blocking is the primary function, and the mask achieves this with a larger shape and a triangle wing that shields the eyes from ambient light, helping you fall asleep more quickly and maintain sleep through the night. The design prioritizes comfort and practicality for travel or home use, so it weighs very little and can be worn in a variety of sleeping environments. The fabric is mulberry silk, described as soft, breathable, and smooth against the skin, reducing friction near the eye area and around the temples. The silk is a natural material; it stays comfortable as you move through different sleep positions, including side sleeping. The mask is made to avoid applying pressure on the eyeballs, which can be helpful for wearers with sensitive eyes or those who wear eye makeup or lash extensions. The strap is adjustable to fit a broad range of head sizes, and it is designed to stay in place without slipping. Easy care is possible by hand washing or machine washing in a laundry bag. Uses include sleep, travel, hotels, office naps, and short meditations, giving straightforward functionality without gimmicks. Its simple profile and clean lines also make it easy to store in a travel pouch or drawer. Color: Green.