Composite Chairmat, No Lip Gray/Natural/41"W x 48"L Designed for Commercial carpet (up to 1/4" thick no carpet pad) and hard floors Color: Gray 5mm thick 2" wide slats Felt backing with non-slip gripper dots keeps mat in place Rounded edges for easy access on and off the mat Folds up for easy shipping and portability Made with 60% bamboo fiber - 30% recycled HDPE and 10% stabilizers and colorants Meets stringent European E1 standard for formaldehyde emissions Hard floor casters are recommended for optimum performance