Our Metal Raised Bed Liners Have Been Carefully Designed To Fit Our Exclusive Metal Raised Beds With Various Sizes And Depths, Providing Added Protection If The Beds Are On Hardstanding Areas And Will Also Help Water Retention And Prevent Soil Washing Out Of The Raised Beds.whether You Are Locating Your Metal Raised Bed On A Hard Surface Or Open Ground Wed Thoroughly Recommend Using One Of Our Thick, One Piece, Polypropylene Fabric Raised Bed Liners. The Porous Material Of The Liner Helps Water Retention, Prevents The Compost And Soil From Running Out And Also Prevents Weeds From Growing Through Beneath. our Raised Bed Liners Are Available In A Range Of Sizes And 2 Depths To Fit Our Metal Raised Beds.please Note: Raised Bed Liners Are Not Available For Every Size And Height Please See List Below For Size Availability. raised Bed Liners Manufactured From Polypropylene Fabricdesigned To Fit Our Single And Double Tier Metal Raised Bedsliners Help To Regulate Drainage And Retain Waterraised Bed Soil Is Notorious For Drying Outliner Will Retain Fine Sand And Compost Used When Growing Certain Vegetables E.g. Carrotsideal If The Bed Is Located On A Patio, In A Courtyard Or Even On Tarmachelps Prevent Leaching Of Soil And Nutrientsthreat Of Staining Patio Or Other Hardstanding Area Is Reducedliner Helps Suppress Weed And Grass Growth When Bed Is Positioned On Soil Or Turf2 Depths Of Liners Available - 1 2 Tier Beds And 3 4 Tier Bedsboth 1 Tier And 3 Tier Liners Will Need To Be Folded Down To Fit The Bed.the Raised Bed Liners Are Available To Fit Beds Of The Following Sizes (actual Liner Dimensions Will Be Smaller):-0.6m X 0.6m (2ft X 2ft)0.6m X 1.2m (2ft X 4ft)0.6m X 1.8m (2ft X 6ft)0.6m X 2.4m (2ft X 8ft)1.2m X 1.2m (4ft X 4ft)1.2m X 1.8m (4ft X 6ft)1.2m X 2.4m (4ft X 8ft)1.8m X 2.4m (6ft X 8ft)