Cooling mats are they all completely safe for our dogs...?

In the light of the very hot weather conditions at the shows recently we are asked alot for dog cooling coats, not a product I am totally convinced about if I'm honest, bit controversial I know, but I think everyone should be able to make up their own minds about products we give to our dogs.. Anyway I thought perhaps a cooling mat might be the next best thing for Ruby as she naturally seems to try to cool herself by getting as much of her tummy on the cool tile floor in our kitchen. Having done a bit of research online there's lots of them to choose from all are stated as non-toxic and safe for dogs. My dogs don't tend to chew things but I'm not 100% sure I would want Ruby to be left alone with this product, Please note I'm not trying to scaremonger and this is the only 'make' I've found with this information, I'm not suggesting all cooling mats are the same or made from this material. Once again it's personal choice but what do you all think ??

Below are the Health and safety instructions.

Health and safety

This product is not suitable for consumption! 
All the materials in the Aqua CoolKeeper™ have been thoroughly tested in several renowned laboratories in Europe and the USA. 
These tests have not indicated any allergic reactions and have proven that the cooling HydroQuartz™ inside the Aqua CoolKeeper™ are non-toxic.

In the case of animals, young children, and persons who cannot decide for themselves about the proper use, Aqua CoolKeeper™ should only be used on them under strict adult supervision.
In the case of consumption of the contents of an Aqua CoolKeeper™, consult a doctor immediately and induce vomiting as quickly as possible. 
If the contents of an Aqua CoolKeeper™ have been consumed, the consumed cooling HydroQuartz™ will absorb a great deal of body fluid, which is very damaging to the health. 
You can always contact us with any concerns or questions, we will be happy to assist you.