Unisex mask designed to promote nasal breathing and reduce dry mouth. I used it once but it doesn't fit, so I'm selling it! Originally priced around 1500 yen. - Product Name: Sleep Quietly Mask - Intended Use: Unisex - Design: Designed to promote nasal breathing - Material: Unknown, but stretchy - Features: Function to reduce dry mouth - Size Adjustment: Adjustable belt included Thank you for looking.