playpen mat

https://wiki-room.win/index.php?title=14_Questions_You_Might_Be_Afraid_To_Ask_About_Play_Mats_For_Babies_0-6_Months_88290

Check your play mat frequently for signs degrading or wear, such as threads falling loose, or damaged foam. Repair or replace the mat if required. Always store it in a dry place to prevent the possibility of mold