These paintbrushes are produced by Rosemary & Co who have been making brushes for 29 years. All the brushes are handmade and not machine made like so many other manufacturers. They buy only the finest tails for the natural hair brushes and have them dressed in Germany before shipping them back to the UK 'dressed' and ready to use. The synthetic fibres used are also of a high quality and should not 'split or curl'. The tails are sourced in Canada & Russia - they are a by-product.