Alum stone by Feret

Féret Bloc Hyalin: Authentic Quality!You can recognize the authentic Bloc Hyalin by its slightly translucent, marble-like appearance and the mention of potassium alum in the list of ingredients. Unlike synthetic alum stones (ammonium alum), which appear opaque, the true Bloc Hyalin stands out with its superior visual quality and natural transparency. Féret Hyaline Bloc, loved for its natural astringent and antiperspirant properties, and trusted for over a century. Made in France, it blends tradition with exceptional craftsmanship.Astringent Properties: Helps tighten the skin and reduce perspiration while remaining gentle and effective. Antiperspirant Action: Forms a thin, transparent film that regulates surface perspiration without clogging pores. It eliminates bacteria, the main cause of unpleasant odors. Natural Deodorant: Prevents bad odors by creating a protective barrier against bacterial growth. Ideal for Athletes: Reduces chafing and prevents injuries caused by friction. Apply