I've only used it once, and it's been kept indoors ever since. It's in clean condition with no mold, as it was stored in a dry office environment. Please note that the box is not included. 【For caring for important clothes and kimonos】Brushing is fundamental for caring for clothes and kimonos. Repeated washing and dry cleaning can damage clothes. Brushing every time you wear your clothes will keep them looking clean. 【100% Natural Horsehair - Doesn't damage fabric】Can be used on a wide range of delicate materials, including clothes, cashmere, shoes, and stoles. This clothing brush uses horsehair to gently remove dust without damaging the fabric. It won't get moldy and will last a long time. Clothing brushes not only remove dirt but also tidy the fibers, preventing pilling and shine, and further preventing mold and moth damage by keeping the clothes clean. (Note: This product is 100% animal hair, so some shedding may occur at first, but it will stop after a few uses. This does not affect the quality.) 【With anti-static function - Prevents dust, pollen, and pet hair from sticking】In winter, when static electricity is likely to occur, it can be difficult to remove dust even with brushing. This clothing brush is recommended for its anti-static function, which prevents static electricity from attracting dust through friction. It's also useful in the spring because it prevents pollen and pet hair from sticking. After brushing, dust and pollen are less likely to stick to clothes, reducing the number of times you need to brush. 【Prevents shape loss, prevents pilling, tidies fibers, and makes clothes last longer】This clothing brush is an item that can remove dust, pollen, and pet hair that has penetrated deep into the fibers of your important clothes with just a few brush strokes. It can also prevent pilling and shape loss by tidying the nap of the clothes. 【Essential household item for autumn and winter】Snana Clothing Brush, Anti-Pilling Brush, Anti-Static Clothing Brush, Suit Coat Brushing, 100% Natural Horsehair, Clothes Dust Remover, Natural Wood, Shoe Brush, Anti-Pilling, Kimono Care, Anti-Static Measures