PY Refill Mop 160g - Box of 10010 Packs of 10 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.