The o.b. Teens menstrual underwear offers a sustainable alternative to disposable menstrual products, specifically designed for teenagers. This reusable underwear uses functional materials that effectively absorb menstrual fluid and prevent leaks, providing reliable protection for 8-12 hours. The underwear absorbs approximately the equivalent of 1-5 tampons while maintaining a thin, lightweight construction comparable to regular underwear. It creates a pleasantly dry wearing experience while remaining breathable for comfort. Designed for individuals with body sizes between 152-164 cm, this menstrual underwear requires simple care: rinse immediately after use with cold water, then machine wash at 40°C with detergent that does not contain fabric softener. Wash before first use. This product represents a follow-up model to previous menstrual underwear options, focusing on practical functionality and ecological sustainability through reusability. The design prioritizes comfort during wear while maintaining performance through absorbent layers. Proper care according to the recommended washing instructions helps to preserve the absorbency and durability of the underwear in the long term. The product addresses the specific needs of younger users through its sizes and functional features, providing a reliable menstrual management solution that combines practical performance with sustainable benefits.