actualy looking at it from my Queen Size point of view it is not that many x's but it does look like it is flame retardent materials.
In the states some lables have flame retardent chemicles and cloths by law to avoid people from getting burned to death or so bad.
Maybe some of you have never heard of it?
Linkback:
https://tubagbohol.mikeligalig.com/index.php?topic=8090.0