Real Techniques Powder Brush - £12.99 Boots (link)

Lets be honest here, what else can I say about the most brilliant range of brushes ever apart from the fact that they're the best make up brushes ever...
 
erm...
 
The Real Techniques Powder Brush is the best powder brush money can buy, best £12.99 I've spent in a long time.
 
Alright then, that will do.