Anji Mountain AMB25011 Composite Chairmat without Lip, Chestnut/Natural, 35 x 48-Inch Designed for Commercial carpet (up to 1/4" thick, no carpet pad) and hard floors The textured, matte surface is resilient and provides a smooth rolling surface Folds up for easy shipping and portability Made with 60% Viscose derived from bamboo fiber, 30% recycled HDPE and 10% stabilizers and colorants Felt backing with non-slip gripper dots keeps mat in place