Mea Shearim is an insulated neighbourhood in the heart of Jerusalem. With its overwhelmingly Haredi population, the streets retain the flavor of an East European shtetl Life which revolves around strict adherence to Jewish law, prayer, and the study of Jewish texts. Traditions in dress may include black frock coats and black or fur-trimmed hats for men and long-sleeved, modest clothing for women. "Modesty" posters in Hebrew and English are hung at every entrance to Mea Shearim. When visiting the neighborhood, women and girls are asked to wear what is deemed to be modest dress (knee-length skirts or longer, no plunging necklines or midriff tops, no sleeveless blouses or bare shoulders) and tourists are requested not to arrive in large, conspicuous groups. During the Shabbat (from sunset Friday until it is completely dark on Saturday night), visitors should refrain from smoking, photography, driving or use of mobile phones. When entering synagogues, men should cover their heads.