Earmuffs

In the Harry Potter series, Earmuffs debut in 'Harry Potter and the Chamber of Secrets' as essential magical gear for safely handling the screaming Mandrakes in Herbology class, featuring assorted colors like pink and fluffy varieties that completely block sound. Though they appear only in Book 2, these earmuffs exemplify the series' inventive magical tools designed for hazardous creatures, underscoring the practical ingenuity of the wizarding world's education system. They do not evolve or reappear in later books, remaining a one-off but memorable piece of Hogwarts equipment.