You will need to rotate them out after each inning behind the plate.
Gel packs will stay cold for 20 minutes.
NOCSAE does not have a category for add-on equipment. Since the Cool-Catcher is not eligible for NOCSAE certification on its own, we had a NOCSAE certified laboratory test the Cool-Catcher according to the protocols to ensure that the addition of the Cool-Catcher did not affect the helmet’s ability to pass the NOCSAE standard; the catcher’s mask tested passed the requirements for re-certification. These hockey style mask included a model from Easton and All Star