These are called Judo tiles, but are they really thick enough to safely absorb the impact of people being thrown to the mat?

Judo Mats, and all martial arts mats, face the dilemma of having a softer surface at the expense of stability for movement. The more "squishy" and soft the foam, the more difficult it is to move around on it. These tiles create a great deal of absorption while creating a surface that has the real feeling of a dojo when you move on them.