Undergraduates at many older universities also wear gowns; the most common essentially a smaller knee-length version of the Bachelor's gown, or the Oxford Commoners gown which is a sleeveless lay type gown and has two streamers at the back at Oxford. At Cambridge, most colleges have their own distinctive design of gown. Undergraduates at St Andrews, with the exception of theology students, commonly wear scarlet woollen gowns with velvet collars. Undergraduate gowns are seldom worn (even in institutions that prescribe them) nowadays except in the older universities.