Used a few times. Includes a bag and 4 earplugs. 99.99% light blocking rate [Adjustable Size] Uses a highly elastic rubber band! Can be adjusted to fit head circumferences from 44 to 88cm, accommodating a wide range of users from children to adults, both male and female. [Washable & Quick-drying] Can be washed in the washing machine even if it gets dirty. The eye mask can be washed in a laundry net, so it dries quickly and is always clean! [Lighter than an egg] Only 35g! The ultra-lightweight design puts no stress on the head, making it feel so light you'll forget you're wearing it.