The site is using dress terminology based on book “La España del siglo XIII: leída en imágenes” by Gonzalo Menendes Pidal, published by Real Academia de la Historia, in Madrid, 1986, ISBN 978-84-600-4861-9.
See below for details.
Bragas - breeches, male underwear, usually linen.
Camisa - underwear shirt, the first layer, with sleeves, usually from white linen. Extant cotton artifacts exist. Length to the hips (camisa a cuerda) or above knees.
Saya - shirt worn over camisa. Usually woolen, less frequently silken.
Pellote - layer worn over saya, woolen or silken.
Garnacha, tabardo, esclavína - travel clothing similar to coat, usually woolen.
Sleeves half-sewn on top and back, so one can decide to protect only body.
Sleeves long tubular to the knee length.
Sleeves cylindrical shape, expanding downwards.
Poncho.
Piel - fur lined woolen coat, wide sleeves usually just to middle of forearm.
Redondel - half-circle woolen cloak with extra opening for left hand at 1/3 circumference and fur lined collar.
Balandre - poncho with hood, worn by shepherds and peasants.