The LoFric® catheter has its own coating, consisting of PVP and salt. When immersed into water the PVP attracts water, creating a so-called hydrophilic surface. A very slippery layer of water comes in contact with the urethra when you catheterize. This outer layer gives the LoFric® catheter a unique ability to reduce friction to a much lower level than what is possible using uncoated catheters with separate lubricants.