The Last Inventory 1/2-in Thick 6-lbs Dense Carpet Pad
Natural Wool Carpet Underlayment - The Green Design Center
Amazon.com: RUGPADUSA - Dual Surface - 8'x10' - 1/4" Thick - Felt + Rubber - Non-Slip Backing Rug Pad - Safe for All Floors : Everything Else
Amazon.com: Grip-It Magic Stop Rug on Carpet Non-Slip Rug Pad for Area Rugs and Runner Rugs, USA-Made Rug Gripper for Carpet Over Carpet Keeps Rugs in Place On Carpet 5 x 7