The Refill Socket Mop consists of a reusable socket and semi-disposable yarn refill. This means the socket can be used time and time again, while the disposable yarn refills are much easier to recycle at end of life. Plus, its colour coded to prevent cross-contamination, making it a more hygienic, cost-effective and eco-friendly way to mop. The Big White Refill mop offers an environmentally-friendly alternative to traditional mops and comprises of two parts: the replaceable mop refill and a detachable socket and clip (sold separately). When the mop is old and dirty the unique, patented socket simply unclips for easy disposal, reducing plastic waste and saving you money. (UK Patent No. 2497337).