Knock Knock Coir DoormatWhos there? Knock Knock is all charm and cheek with its playful tri tone lettering in green, orange and pale blue, all wrapped in a scalloped green border. Quirky, colourful and impossible to ignore, just the welcome your doorstep deserves. Our Coir Doormats are made from natural coconut husk fibres. These fibres are well known for their dirt scraping capability ensuring that all those unwanted bits of grit and dirt are left outside.