Various symbolic and religious qualities are attributed to Hasidic dress, though they are mainly apocryphal and the clothes' origin is cultural and historical. For example, the long overcoats are considered modest, the shtreimel is supposedly related to shaatnez and keeps one warm without using wool, and Sabbath shoes are laceless in order not to have to tie a knot, a prohibited action. A "gartel" divides the Hasid's lower parts from his upper parts, implying modesty and chastity, and for kabbalistic reasons, Hasidim button their clothes right over left. Hasidic men customarily wear black hats during the weekdays, as do nearly all Haredi men today. A variety of hats are worn depending on the group: Chabad men often pinch their hats to form a triangle on the top, Satmar men wear an open-crown hat with rounded edges, and "Samet" (velvet) or "biber" (beaver) hats are worn by many Galician and Hungarian Hasidic men.