Hard Wearing Non Slip Indoor Floor Runner Mat Natural - 180 x 67cm 4 "Good Hard wearing mats" Mrs Sprenkel 01 February 2017 I have had two of these mats for well over a year, they have washed very well, they are laid over carpet tiles and move on them and have rucked up in the middle therefore having to be continually straightened. Any ideas to keep them in place please? A note from the team Thank you for placing your review. We're sorry the mats move over your carpet tiles. We would recommend using the Grip A Rug [ref 24502 ] to help with this.