Manual opening, 8 aluminium /fibreglass ribs, steel shaft, hand painted designs, plastic handle with a wrist strap. WINDPROOF frame. This umbrella is so skinny it is only 3cm diameter and 25cm long when closed and weighs only 225grams yet it opens out to the size of a normal 97cm diameter umbrella and then folds and rolls up easily to go back in to its matching cuff case.