Most mats are rolled up and unrolled every day for practice. This constant movement can cause extensive damage to mats and they may become cracked and torn. Wrestling mat foam is composed of water vapor which escapes each time the mat is torn. As the mat begins to dry out, the foam may begin to crumble and fall apart.
Some mats are beyond the point of repair.
Walk over the entire surface. The mat should feel firm with no soft or dead spots. If the mat does not spring back to its original state within 2-3 seconds the mat cannot be reconditioned. The mats below are in very poor condition and likely cannot be repaired. Gritty mats cannot be reconditioned.