MTG: Modern Horizons 2 Playmat V1 - Rules of Play says:

Ultra PRO’s Playmats feature exclusive crops of popular Magic: the Gathering artwork. Made with a soft fabric top to reduce damage to cards during play and a non-slip rubber backing to keep the playmat from shifting during use, playmats enhance the gameplay experience. With dimensions of approximately 24 in. x 13.5 in., a playmat also makes an excellent oversize mousepad for home or office.