It looks like it should be safe. Polyester is non-toxic and generally cuts well. Polyethylene melts somewhat when cut but it should be fine in this application given how thin of a layer it is. They don’t say what’s in their adhesive but I’m guessing it’s ok.
3M doesn’t provide an actual SDS for this material (instead they’ve provided several statements saying it’s not required) but I’m pretty sure it will be ok. The rubber adhesive may be slightly stinky when cut but 
that’s not the end of the world.