These brushes are made in Italy by a company that has been specialising in making brushes for many years.
Take care of them, do not leave them sitting on the bristles in a jar of water overnight. Wash with van Gogh Brush Soap and water to condition your bristles as you clean them. Fling out excess water and reshape by hand. Lay flat to dry. Or, if you want them to be perfect the next day, wrap the damp brush in paper towel and lay flat to dry over night.
They will last a long time with proper care.